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| All Patents in class D15/9 | |||||
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| Number | Date | Patentee | Title | Type | |
| D57,812 | May 10, 1921 | S.D. Black, A.G. Decker | Design for a housing for electric air compressors and motors | air compressors | |
| 1,450,032 | Mar. 27, 1923 | J.W. Gardner | Compressor mechanism | air compressors | |
| 2,105,402 | Jan. 11, 1938 | R.L. Brownlee | Hydraulic hold-down for squaring shears | metal shearing machines | |