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| All Patents in class 451/384 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 659,778 | Oct. 16, 1900 | A.R. Weaver | Lathe Chuck for Grinding Watch Crystals | |
| 2,394,242 | Feb. 05, 1946 | F.C. Jearum | Dop or Holder for Diamonds and Like Tool Pieces for Grinding or Polishing Purposes | ||
| 3,962,832 | Jun. 15, 1976 | R.H. Strasbaugh | Fluid Responsive, Leverage Operated Chuck | ||