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| All Patents in class 91/404 | |||||
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| Number | Date | Patentee | Title | Type | |
| 646,458 | Apr. 03, 1900 | H.A. Pedrick | Pneumatic Hoisting Apparatus | hoists, winches, come-alongs | |
| 675,880 | Jun. 11, 1901 | J.A. Carlisle | Portable Pneumatic Riveter | riveting machines | |
| 2,778,342 | Jan. 22, 1957 | H.W. Ringman | Poppet type valve distributing system for a servo-motor | ||