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| Number | Title | Issue Date |
| 7232108 | Exhaust valve for a bag An exhaust valve for a bag comprising a valve body having an exhaust opening communicating with a part between the inner and outer surfaces of the bag, a lid body detachably fitted to the valve body having a suction opening, a valve plate arranged above the upper en... | 06/19/2007 |
| 7074008 | Small-sized hydroelectric generator A rotator with an impeller and a stator generating an induced voltage are arranged in a casing. The tap water flowing flows through a main passage, which has a first jet orifice facing the impeller, and rotates the impeller. A bypass running from the inflow port and... | 07/11/2006 |
| 6712334 | Exhaust valve for a bag A movable lid is mounted to a valve body movably in an up-and down direction toward and away from the valve body whereby the valve body is lowered to be open against force of a spring by pressing a suction nozzle of an electric vacuum cleaner onto the movable lid an... | 03/30/2004 |
