Usually when two parties enter an exclusive license, they sign an assignment contract with some clauses that enables the patent's ownership reverted to the assignor at the end of the contract, or if the assignee fails to pay the license fee.
22.
The "'tri-star "'is a novel wheel design originally by Robert and John Forsyth, assignors to Lockheed in 1967 in which three wheels are arranged in an upright triangle with two on the ground and one above them.
23.
These requirements are fundamental characteristics of a statutory assignment : Absolute assignment ( an unconditional transfer : conditions precedent or part of a debt are not absolute ) and the assignment must be made in writing and signed by the assignor, and in particular, this applies to real property.
24.
Following his graduation from Quakertown High School in 1938, Detweiler moved to Federalsburg, Maryland in 1939 . He then became a well known sports figure in an area that involved baseball, basketball, and football, while serving as an official, umpire, and assignor of games.
25.
In other cases, the contract may be a negotiable instrument in which the person receiving the instrument may become a holder in due course, which is similar to an assignee except that issues such as lack of performance by the assignor may not be a valid defense for the obligor.
26.
Under the modern " American rule ", now followed in most U . S . jurisdictions, the first assignor with equity ( i . e . the first to have paid for the assignment ) will have the strongest claim, while remaining assignees may have other remedies.
27.
:" Doctrine of assignor estoppel prevents unfairness and injustice of permitting party to sell patent rights and later assert that what he sold is worthless . " " Mentor Graphics Corp . v . Quickturn Design Systems, Inc . ", 150 F . 3d 1374 ( Fed.
28.
The consequence was that, with these and certain statutory exceptions ( e . g ., actions on policies of insurance ), an action on an assigned chose in action must have been brought at law in the name of the assignor, though the sum recovered belonged in equity to the assignee.
29.
In addition the rule applicable to an anticipatory assignment of income does not apply because it only applies when the assignor is entitled at the time of the assignment to receive the income at the future date and is vested with such a right In this case, Paul was never entitled to receive the prize.
30.
If the assignor agrees to continue paying rent to the lessor and subsequently defaults, the lessor can sue both the assignor under the original contract signed with the lessor as well as the assignee because by taking possession of the property interest, the assignee has obliged himself to perform duties under covenant such as the payment of rent.
