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| Patents for John A. Caldwell | |||||
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| Picture | Number | Date | Patentee | Title | |
| 190,193 | May 01, 1877 | J.A. Caldwell | Coffee Roaster | ||
 | 191,026 | May 22, 1877 | J.A. Caldwell | Tool For Tightening and Fastening Straps For Securing Hose To Coupling | |
 | 197,717 | Dec. 04, 1877 | J.A. Caldwell | Implement for Tightening and Fastening Straps or Bands Employed in Securing Hose to Couplings | |
 | 211,132 | Jan. 07, 1879 | J.A. Caldwell | Improvement in Instruments for Scribing Stair-Curves | |
 | 495,300 | Apr. 11, 1893 | J.A. Caldwell | Stair-Beveling Instrument | |