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Patent applications and USPTO patent grants for Zenker; Walter.The latest application filed is for "change-speed gear in group-type construction".
Patent | Date |
---|---|
Change-speed gear in group-type construction Grant 4,580,459 - Zenker , et al. April 8, 1 | 1986-04-08 |
Transmission with double friction clutch Grant 4,287,781 - Zenker September 8, 1 | 1981-09-08 |
Power take off with clutch and brake Grant 4,108,291 - Zenker August 22, 1 | 1978-08-22 |
Variable gear transmission Grant 4,106,364 - Zenker , et al. August 15, 1 | 1978-08-15 |
Change gear transmission in group construction, especially for land vehicles and vehicles for the building industry Grant 4,023,418 - Zenker May 17, 1 | 1977-05-17 |
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