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Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 4149659 | Feed return impeller A closed loop feed trough having a feed chain moveable lengthwise therein to distribute feed from a hopper associated with the trough provided with an impeller which rotates in response to movement of the chain to assist in returning uneaten feed to the h... | 04/17/1979 |
