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| Patents for John T. Gardner | |||||
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| Number | Date | Patentee | Title | Type | |
| 343,692 | Jun. 15, 1886 | J.T. Gardner, F. Bentel | Horse hay-rake | ||
| 439,053 | Oct. 21, 1890 | C.W. Cotton, J.T. Gardner, A.W. Margedant | Spoke-facing machines | wheelwright | |
| 439,386 | Oct. 28, 1890 | C.W. Cotton, W.C. Margedant, J.T. Gardner, A.W. Margedant | Machine for preparing spokes | wheelwright | |
| 1,224,628 | May 01, 1917 | J.T. Gardner | Automobile wheel machine | vehicle wheel maintenance | |