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| Patents for John R. Proksa | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,310,992 | Feb. 16, 1943 | J.R. Proksa | Boring device | ||
| 2,541,719 | Feb. 13, 1951 | J.R. Proksa | Machine Tool Bit Holder | ||
 | 2,860,402 | Nov. 18, 1958 | J.R. Proksa | Cutting Tool Holder | |
| 2,912,744 | Nov. 17, 1959 | J.R. Proksa | Tool Bit Holder | ||