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| Patents for B. Roi | |||||
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| Number | Date | Patentee | Title | Type | |
| 258,420 | May 23, 1882 | R. Hessel | Corkscrew | combination cork extractors | |
| 370,461 | Sep. 27, 1887 | R. Fleck | Machine for making wood wool | excelsior machines | |
| 379,301 | Mar. 13, 1888 | C. Wittkowsky | Method of manufacturing wooden relief-plates | specialty woodworking machines | |
| 412,228 | Oct. 08, 1889 | F. Küppermann, A. Altmann | Petroleum Motor | internal combustion engines | |