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| Patents for Ball & Roller Bearing Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,210,937 | Jan. 02, 1917 | L.R. Heim | Roll-grinding machine | centerless grinders | |
| 1,264,928 | May 07, 1918 | L.R. Heim | Device for Feeding Rolls for End Grinding | ||
| 1,264,929 | May 07, 1918 | L.R. Heim | Grinding Machine | ||
| 1,264,930 | May 07, 1918 | L.R. Heim | Roll Grinding Machine | ||
| 1,281,366 | Oct. 15, 1918 | L.R. Heim | Method of Grinding Hardened Rolls | ||
| RE15,035 | Jan. 25, 1921 | L.R. Heim | Roll-grinding machine | centerless grinders | |