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| Patents for H. E. Bowser | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 268,978 | Dec. 12, 1882 | F. Armstrong | Tap Wrench | |
 | 269,141 | Dec. 12, 1882 | N.W. Vandegrift | Pipe Vise | |
 | 284,275 | Sep. 04, 1883 | J. Chantrell | Bit-stock | |
 | 291,267 | Jan. 01, 1884 | N.W. Vandegrift, F. Armstrong | Pipe Wrench | |
 | 302,320 | Jul. 22, 1884 | J. Chantrell | Ratchet-brace | |