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 |
| 5970155 | Headset for hearing protectors The invention relates to a headset (1) for a hearing protector provided with a padding part (12) having an essentially elliptical ear opening (18). The headset comprises a microphone (2), an earphone (3), and conducting wires (7) for bringing signals to t... | 10/19/1999 |
| 5790681 | Fixing assembly for a helmet headset A fixing assembly for a helmet headset comprises a body piece, a microphone attached to the body piece, an earphone attached to the body piece, and cabling for taking signals to the earphone and from the microphone An elongated tongue piece is attached to... | 08/04/1998 |
