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Population Council

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Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US4967949A	Apparatus for effecting occlusion of the vas deferens	Expired / Lapsed	1989-03-21	1990-11-06	49	Details
US4394864A	Apparatus and method for effecting occlusion of the vas def…	Expired / Lapsed	1981-04-15	1983-07-26	21	Details
US4292965A	Intravaginal ring	Expired / Lapsed	1978-12-29	1981-10-06	17	Details
US3533406A	Intrauterine contraceptive device	Expired / Lapsed	1968-09-18	1970-10-13	0	Details