Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7980510 | Small unmanned aircraft A small unmanned airplane includes; a main wing having a camber airfoil whose under surface is approximately flat, narrowing in the shape of taper to a blade tip, leading edge of which holds sweepback angle, of flying wing type which has an aerodynamic surface of ta... | 07/19/2011 |
| 7896112 | Supplementary support structure for robot A supplementary support structure, which supports the body of a robot (1), comprises a contact component (7) which is disposed in a part near a joint (2c) on the distal end, having a hand (3) disposed thereon, of an arm (2) ... | 03/01/2011 |
| 7757991 | Helicopter blade vortex interaction noise reducing method and device In a blade vortex interaction (BVI) noise reduction system for a helicopter a rotor blade, a tab is movable via an actuator from a first position, wherein the tab is within the blade, to a second position, wherein the tab extends outwardly from a trailing edge of th... | 07/20/2010 |
| 7743444 | Cable stayed suspension bridge making combined use of one-box and two-box girders A cable-stayed suspension bridge having characteristics of a cable stayed bridge and those of a suspension bridge at the same and time and using one-box and two-box girders in combination is disclosed. The bridge grinder of the cable-stayed suspension bridge include... | 06/29/2010 |
| 7204147 | Ultrasonic inspection method for weld zone An inspection method can easily determine welding condition by just comparing an echo height returned from the weld zone of a real product with a master data. An master data is made based on the data from prepared test pieces corresponding to the real product... | 04/17/2007 |
| 7138200 | Fuel cell and separator for the same An improved fuel cell makes uniform partial gas pressure of a fuel gas flowing through a gas passage formed between an electrode and a separator of a fuel cell, activating an electrode reaction in a whole region of the electrode surface along the gas passage. The in... | 11/21/2006 |
| 6384594 | Revolution speed detecting apparatus for extracting signal corresponding to revolution speed Through differentiation of input signal Vw from a sensor the angular frequency ω becomes included in the amplitude component. Through a plurality of differential operations the amplitude including the angular frequency ω varies, but the time-dependent t... | 05/07/2002 |
| 5784739 | Super-long span suspension bridge As a countermeasure against storms for long span, particularly super-long span suspension bridges with the center span exceeding 2,000 m, there is provided a super-long span suspension bridge which can be improved of its static and dynamic wind resistance... | 07/28/1998 |
| 5562414 | Noise reduction device for rotorcraft A noise deduction for a rotorcraft includes a unit to produce compressed air, a drive shaft provided with a first air supply passage in which the compressed air from the air-producing unit flows, and rotor blades provided with second air supply passages i... | 10/08/1996 |
| 5539946 | Temporary stiffening girder for suspension bridge The stiffening girder type suspension bridge according to the present invention is designed with a smaller dead load under normal conditions, and applied with a temporary dead load as an additional mass to improve the static characteristics and aerodynami... | 07/30/1996 |
