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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 |
| 7378750 | Tidal flow hydroelectric turbine A hydroelectric turbine for the production of electricity from tidal flow forces, the turbine having a rotor preferably with an open center such that the blades are mounted between an inner rim and outer rim, wherein retaining members and anti-friction members are p... | 05/27/2008 |
