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| All Patents in class 74/87 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,013,235 | Sep. 03, 1935 | J.G. Collins | Vibrating detector for automobiles | vehicle mechanic | |
| 2,073,393 | Mar. 09, 1937 | A.W. Mall | Vibrator for concrete work | ||
| 2,167,987 | Aug. 01, 1939 | A.W. Mall | Vibrator | ||
| 2,395,537 | Feb. 26, 1946 | S.A. Crosby | Rubbing machine | handheld power sanders | |