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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 |
| 4166510 | Continuous automatic weighing conveyor for flowable solids Flowable solids are continuously and accurately weighed during transport to a collection or discharge point. A counterweight pivoted conveyor carries a rotating disc at its discharge end, one face of which frictionally engages a relatively stationary comp... | 09/04/1979 |
