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| All Patents in class 451/13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,754,140 | Apr. 08, 1930 | H.H. Asbridge | Grinding or Abrading Machine | grinding machines | |
| 2,005,332 | Jun. 18, 1935 | H.H. Asbridge | Internal grinding machine | ||
| 2,376,237 | May 15, 1945 | A.D. Stuckey, J. Decker | Grinding Machine | cylindrical grinders | |
| 2,518,600 | Aug. 15, 1950 | W.A. Cox | Infeed Attachment for Grinding Machines | centerless grinders | |