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| All Patents in class 404/116 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,148,214 | Feb. 21, 1939 | A.W. Mall | Vibrating machine | ||
| 2,223,733 | Dec. 03, 1940 | A.W. Mall | Gang vibrator construction | ||
| 2,223,734 | Dec. 03, 1940 | A.W. Mall | Gang vibrator construction | ||
| 2,248,103 | Jul. 08, 1941 | A.W. Mall | Road vibrator | ||