Actor Marlon Brando has four patents, all named "Drumhead tensioning device and method."
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| Number | Title | Issue Date |
| 5393192 | Underfloor extendible ramp for vehicles The disclosure comprises a tray mountable under the floor of a vehicle, which tray contains an extendible ramp mechanism. This mechanism comprises a ramp and a driving panel for the ramp. The ramp is fulcrummed intermediate its ends on the outer ends of p... | 02/28/1995 |
| 5316432 | Wheelchair lifts with automatic barrier Steps are convertible into a platform of an elevator for wheelchairs such as installed in vehicles and buses, during which conversion a barrier is automatically raised from the bottom step to be at the outer edge of the platform. The barrier is operated b... | 05/31/1994 |