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Patent applications and USPTO patent grants for Knippel; Willis H..The latest application filed is for "double locking door latch mechanism for railway hopper cars".
Patent | Date |
---|---|
Double locking door latch mechanism for railway hopper cars Grant 4,213,725 - Knippel July 22, 1 | 1980-07-22 |
Self steering railway car Grant 4,164,188 - Hallam , et al. August 14, 1 | 1979-08-14 |
Operating mechanism for box car sliding doors Grant 4,095,371 - Knippel June 20, 1 | 1978-06-20 |
Cushioned Underframe For Railway Cars Grant 3,802,576 - Marsh , et al. April 9, 1 | 1974-04-09 |
Unit Train Automatic Unloading System Grant 3,730,360 - Aquino , et al. May 1, 1 | 1973-05-01 |
Covered Hopper Car With Hatch Cover Means Grant 3,664,270 - Stark , et al. May 23, 1 | 1972-05-23 |
Railway Car Cushioning Device Grant 3,651,953 - Knippel , et al. March 28, 1 | 1972-03-28 |
End-of-railway-car Cushioning Installation Grant 3,583,573 - Knippel , et al. June 8, 1 | 1971-06-08 |
Hydraulic Cushioning Device For Railway Cars Grant 3,568,856 - Knippel March 9, 1 | 1971-03-09 |
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