Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 8122843 | Vehicle fuel efficiency monitor and signalling device A fuel efficiency signal device intended to be interposed between the accelerator pedal of a vehicle and a floor below the pedal. The signal device has wedge shaped, flexible walled, self supporting air container having walls sealingly blended to adjacent walls to f... | 02/28/2012 |
| 7038576 | Electropneumatic horn An electropneumatic acoustic horn is disclosed, comprising an electric compressor unit for generating compressed air and a sound wave generator comprising at least an acoustic chamber associated to at least a volute wound acoustic duct adapted to propagate the produ... | 05/02/2006 |
| 6550416 | Pneumatic valve device This invention relates to a pneumatic valve device, such as a pneumatic horn and a pneumatic sprayer, which is operable by pressurized gas from a storage vessel. It comprises a valve pneumatically connectable to the storage vessel to admit and release pre... | 04/22/2003 |
| 5782198 | Audible warning device The inventive audible warning device includes, in a preferred embodiment, a refillable pressurized air tank having a service port, a cover for covering the service port, an air pump integrated with the tank for filling the tank within pressurized air, an ... | 07/21/1998 |
| 5704154 | Weapon mounted game caller This present invention relates to apparatus for use in hunting wild game animals and waterfowl, and more particularly to a weapon mounted wild animal game caller. This weapon mounted wild animal game caller finds particular application in attracting deer.... | 01/06/1998 |
| 5638767 | Handheld warning device A handheld device used by skaters and the like for warning pedestrian traffic comprises an air bladder attached to a strap that is secured to the palm of the hand in such a way that when the user simply squeezes the bladder firmly, a loud honking sound is... | 06/17/1997 |
| 5546075 | Warning apparatus A warning apparatus comprising a plurality of warning mat units interconnected and arranged side by side in a such manner as to surround a dangerous area, in which the warning mat units each comprise a base plate, a flexible cover sheet secured to an uppe... | 08/13/1996 |
| 5503101 | Audible push-up detector An audible push-up detector produces a sound when the device is compressed between the chest of a user and the underlying floor or surface, thus alerting an instructor or supervisor, as well as the user of the device, that the exercise has been performed ... | 04/02/1996 |
| 5040673 | Stationery case having a whistle Disclosed is a stationery case for keeping writing materials, which comprises an ornament mounted on a compression spring which is fastened in the interior of the casing. The ornament has a magnet fastened therein and is pressed and released so that clips... | 08/20/1991 |
| 3952688 | Accelerator movement indicator A device for attaching to the underside of an internal combustion engine accelerator which is compressed during depressing of the accelerator. A rate of accelerator depression faster than that efficiently necessary causes the device to emit an audible sig... | 04/27/1976 |
