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| All Patents of Type: oil grooving machines | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,343,554 | Jun. 15, 1920 | W.F. Fischer | Machine for Forming Grooves | oil grooving machines | |
| 1,675,136 | Jun. 26, 1928 | E.P. Sacrey | Machine for Cutting Oil Grooves | oil grooving machines | |
| 2,339,630 | Jan. 18, 1944 | A.F. Fischer, W.F. Fischer | Milling Machine | oil grooving machines | |