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| All Patents in class 221/254 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,648 | Apr. 05, 1853 | T. Newbury | Apparatus for feeding blanks to screw-machines | screw machines | |
| 1,104,029 | Jul. 21, 1914 | K. Weiss | Machine for feeding headed blanks | ||
| 1,476,064 | Dec. 04, 1923 | T. Eynon | Bolt-hoppering machine | ||
| 2,208,759 | Jul. 23, 1940 | J. Gualtiere | Clamp or prong rivet feeding mechanism | riveting machines | |