Transferable Character of Patent Rights
A Philippine patent is a property right over an invention, not merely a personal privilege of the named inventor. The IP Code treats patents, patent applications, and the inventions to which they relate as property protected in the same manner as other property rights under the Civil Code. Because the right is proprietary, it may be assigned, inherited, bequeathed, licensed, mortgaged, levied upon, or otherwise transmitted in accordance with law.
The transferable interest is the right, title, or interest in the invention and in the patent or patent application covering it. Transfer may occur before filing, while the application is pending, or after the patent is granted. What passes depends on the transferor's title and the language of the instrument, because no person can convey more patent rights than that person owns.
Inventorship and ownership are related but distinct. The inventor remains the factual source of the invention, while ownership may belong to the inventor, an assignee, heirs, a successor entity, or another person entitled by law or contract. An assignment changes proprietary control but does not erase the identity of the true inventor or cure a defect in entitlement.
Assignment, Transmission, and License
| Mode | Nature | Primary effect |
|---|---|---|
| Assignment | Voluntary transfer of ownership or an ownership interest in the invention, patent application, or patent | The assignee steps into the transferred proprietary position and may exercise the rights transferred, subject to the patent term, limitations, and recorded or binding burdens. |
| Transmission | Transfer by succession, bequest, merger, consolidation, execution, foreclosure, court order, or other operation of law | The successor acquires the transferable patent rights of the predecessor to the extent allowed by the governing law or juridical act. |
| License | Permission to use or exploit the patented invention without transfer of title | The licensor remains owner, while the licensee receives contractual or statutory authority to do acts that would otherwise infringe. |
An exclusive license may give the licensee commercially powerful control, but it is not an assignment unless title or an ownership interest is actually transferred. The substance of the transaction, not the label used by the parties, determines whether ownership passed.
Subject Matter That May Be Transferred
The IP Code permits the transfer of inventions and any right, title, or interest in and to patents and the inventions covered by them. This broad formulation covers the right to apply for a patent, a pending patent application, an issued patent, an undivided share in the patent, and related proprietary claims if the instrument or law transfers them.
- The right to apply for a patent may be assigned before the application is filed, so the assignee may appear as applicant or successor applicant.
- A pending application may be assigned, allowing the assignee to prosecute the application, respond to office actions, pay fees, and receive the grant if the application matures into a patent.
- An issued patent may be assigned for the remaining patent term, subject to annuities, defenses to validity, statutory exceptions, compulsory license, government use, and existing contractual burdens.
- Accrued royalties, unpaid license fees, or claims for past infringement should be expressly covered if the parties intend them to pass with the patent title.
- Foreign counterpart patents are separate territorial rights and do not automatically pass with a Philippine patent unless the transaction covers them under the applicable foreign law.
A sale of a patented machine, product, or article is not an assignment of the patent. It transfers the corporeal or commercial article, while the intangible exclusive right remains with the patent owner unless the transaction separately conveys the patent right.
Entire, Partial, and Territorial Assignments
An assignment may cover the entire right, title, and interest in the patent and the invention covered by it. In that case, the assignor parts with ownership of the transferred patent right, and the assignee becomes the person entitled to exploit, license, enforce, and further transfer the patent within the scope of the assignment.
An assignment may also cover an undivided share of the entire patent and invention. The parties then become joint owners of the patent right. Each joint owner has a fractional proprietary interest in the same indivisible patent, rather than ownership of separate physical parts of the invention.
An assignment may be limited to a specified territory. Since a Philippine patent operates within Philippine jurisdiction, a territorial assignment divides the enjoyment or control of the Philippine patent right according to the territory stated in the instrument, without extending the patent beyond its statutory territorial reach.
Joint Ownership
Joint ownership requires careful treatment because a patent is an exclusionary right capable of being impaired by unilateral action. A co-owner may transfer only the share or authority that belongs to that co-owner, unless the other co-owners authorize a broader disposition. No co-owner may validly assign the entire patent, surrender the patent, grant an exclusive right that destroys the equal enjoyment of the others, or compromise the whole proprietary right without proper authority.
In the absence of a special agreement, Civil Code principles on co-ownership help govern contribution to expenses, enjoyment of the common property, acts of administration, and disposition of shares. A co-ownership agreement may allocate responsibility for annuities, prosecution, enforcement, licensing, revenue sharing, and decisions on settlement or abandonment.
Form of Assignment
An assignment of a patent-related right must be in writing and acknowledged before a notary public or another officer authorized to administer oaths or perform notarial acts. The acknowledgment gives the instrument the formal character needed for reliable proof and registration.
The written instrument should identify the parties, the invention, the patent application or patent number when available, the scope of the transferred right, the effective date, the territory, any retained rights, existing licenses, and whether accrued causes of action or royalty claims are included. Cause or consideration remains governed by ordinary civil law principles on contracts.
A defective or informal undertaking may produce personal obligations between the parties under general contract law, but it is vulnerable as proof of patent title and may be insufficient for recordation. A registrable assignment should therefore match the statutory form and clearly describe the affected patent right.
Recordation with the Intellectual Property Office
The Intellectual Property Office records assignments, licenses, and other instruments relating to the transmission of any right, title, or interest in inventions, patents, or patent applications when the instrument is presented in due form. Recordation aligns the patent register with ownership reality and gives notice to persons dealing with the patent.
Recordation is not the source of the agreement between assignor and assignee; the written transfer is the source of the parties' rights between themselves. However, non-recordation creates serious third-party risk. An unrecorded instrument is void as against a subsequent purchaser or mortgagee for valuable consideration and without notice, unless the earlier instrument is recorded within three months from its date or before the subsequent purchase or mortgage.
| Situation | Effect |
|---|---|
| Earlier assignment recorded within three months from its date | The assignee preserves priority against later purchasers or mortgagees even if they later claim lack of notice. |
| Earlier assignment recorded before the later purchase or mortgage | The later transferee is charged with the recorded state of title and cannot prevail as a purchaser or mortgagee without notice. |
| Earlier assignment not timely recorded and not recorded before the later transaction | The earlier instrument is ineffective against a later purchaser or mortgagee who gave value and had no notice. |
Notice may be actual or constructive. A person acquiring or financing patent rights is expected to examine the patent register, the chain of title, and known licensing or security arrangements. Recordation does not enlarge the patent, validate an invalid patent, or cure a transfer made by a person with no title.
Effects of Assignment
The assignee acquires the economic and juridical incidents of ownership within the transferred scope. These include the right to exclude others, authorize use, collect transferred royalties, maintain or abandon the patent subject to law and contract, and enforce the patent against infringers to the extent of the interest acquired.
The assignor loses the rights that have been assigned and cannot continue exploiting the invention in a manner inconsistent with the transfer, unless a license-back or retained right exists. A later assignment by the assignor of the same right may expose the assignor to liability and may also create a priority dispute governed by recordation and notice.
The assignee takes the patent with its legal limits. Assignment does not extend the patent term, broaden the claims, revive a lapsed patent, eliminate prior licenses, defeat statutory exceptions, bar compulsory licensing, or prevent invalidity defenses. A patent transferred near the end of its life remains enforceable only for the unexpired term and only while maintenance requirements are satisfied.
Transmission by Succession and Other Operation of Law
Upon the patent owner's death, patent rights pass as part of the estate according to succession law, subject to administration, debts, partition, and valid testamentary dispositions. Heirs or devisees acquire only the rights that belonged to the decedent, and co-heirs may hold the patent in common until partition or assignment.
A juridical entity may acquire or transfer patent rights through merger, consolidation, liquidation, foreclosure, execution sale, judicial order, or other legal process. The successor should record the instrument or document proving transmission so that the patent register reflects the new holder of title or interest.
Transmission by law does not avoid the need to prove the chain of title. A successor asserting ownership must connect its claim to the original owner or a valid prior transferee through documents sufficient to identify the affected patent right and the juridical event that caused the transfer.
Effect on Patent Applications
When a patent application is assigned, the assignee may become the party entitled to continue prosecution and receive the patent grant. The transfer does not alter the substantive requirements of patentability, the filing date, the disclosures made, or the need to comply with procedural requirements before the Bureau of Patents.
An assignment of an application should be recorded to avoid disputes over who may act before the Office and who is entitled to the eventual patent. If several persons claim inconsistent rights to the same application, the Office and the courts may require documentary proof of title rather than rely on possession of copies or private assertions of ownership.
Licenses, Encumbrances, and Existing Burdens
A patent assignment is commonly affected by pre-existing licenses, security interests, settlement agreements, co-ownership arrangements, or technology transfer terms. An assignee who takes with notice of such burdens, or takes subject to recorded instruments, cannot ignore them merely because title has changed.
A license granted before assignment generally remains governed by its terms. The assignee may become entitled to future royalties if the contract and assignment transfer that entitlement, but the licensor's personal obligations and warranties should be examined separately. Nonexclusive licenses, exclusive licenses, sublicensing authority, and license-back arrangements should be distinguished because they allocate control differently.
A patent may also serve as security for an obligation or be reached by lawful execution, subject to the rules on recordation and priority. The mortgagee or purchaser at execution acquires only the interest encumbered or sold, and the acquired right remains subject to the same patent limitations that bound the original owner.
Enforcement After Transfer
The person possessing the relevant right, title, or interest may enforce the patent to the extent that the person's own rights are infringed. A full assignee normally has standing to sue for infringement occurring after the assignment, while a partial assignee or co-owner must show the particular proprietary interest affected.
Claims for infringement that occurred before the transfer should be expressly assigned if the assignee is intended to recover for past acts. Without clear language, a transfer of title is ordinarily understood to operate prospectively, while accrued personal claims may remain with the person who owned the right when the infringement occurred.
Enforcement authority should be consistent with ownership records. Recording the transfer reduces challenges to standing, clarifies who may receive damages or royalties, and prevents the infringer from exploiting uncertainty in the chain of title.
Practical Legal Consequences
Assignment and transmission rules protect both private autonomy and commercial reliability. They allow patent rights to circulate as business assets, pass through succession, secure obligations, support financing, and organize technology commercialization while preserving a public record of title.
The controlling questions in any transfer are whether the transferor owned the right, whether the instrument validly described and conveyed the interest, whether the transaction was in the required form, whether it was recorded in time to affect third persons, and whether existing limitations or burdens reduce the value of the right acquired.