Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 6142910 | Method and therapy software system for preventing computer operator injuries A method and therapy software system for preventing computer operator injuries combines a computer with a software system and prevents or rehabilitates computer operator injuries resulting from the prolonged use of a computer keyboard or mouse associated ... | 11/07/2000 |