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| Patents for John R. MacIntosh | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,801,504 | Aug. 06, 1957 | J.R. MacIntosh, S.A. Mercurio | Abrasive wheel structure | grinding wheels | |
| 2,874,519 | Feb. 24, 1959 | J.R. MacIntosh, S.A. Mercurio | Expansible abrasive wheel | grinding wheels | |
| 2,963,833 | Dec. 13, 1960 | J.R. MacIntosh, S.A. Mercurio | Expansible wheel and hub structure | grinding wheels | |