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| Patents for Charles C. Pierce | |||||
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| Number | Title | Classification(s) | |||
| 671,177 | Derrick-engine | 192/93A, 254/302, 254/304, 254/313 | |||
| 710,954 | Drum-reversing device for winding-engines | 254/293, 254/295, 254/313, 476/15 | |||
| 718,916 | Combined brake and friction operating mechanism | 192/17R, 254/366, 74/471R | |||
| 802,844 | Reversible driving device | 254/347, 254/350, 475/310 | |||
| 816,640 | Logging apparatus | 414/449 | |||