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Patent Developers Inc

Patent Dev

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2830466A	Differential mechanism	Expired / Lapsed	1955-12-12	1958-04-15	0	Details
US2638794A	Differential mechanism	Expired / Lapsed	1949-04-13	1953-05-19	0	Details
US2385864A	Differential mechanism	Expired / Lapsed	1943-06-17	1945-10-02	0	Details
US2329059A	Differential mechanism	Expired / Lapsed	1942-06-02	1943-09-07	0	Details