Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| D653244 | Ear piece | 01/31/2012 |
| 7574239 | Handsfree car mounting kit A handsfree car mounting kit for a mobile telephone (6) coupled to a head-set (4) via a Bluetooth radio module consists of a passive communications unit (1), which has a loudspeaker and a microphone (5), optionally coupled to an amplifier... | 08/11/2009 |
| D573138 | Headset | 07/15/2008 |
| D569849 | Headset | 05/27/2008 |
| 7366298 | Headset A headset (1, 10, 30) e.g. for use in connection with wireless communication by means of Bluetooth technology in connection with mobile telephones, PSTN telephones and the like, which comprises a housing (2, 3, 11, 28) with a transducer (5, 12, 27 | 04/29/2008 |
| D566697 | Wireless headset base | 04/15/2008 |
| D566695 | Headset | 04/15/2008 |
| D566693 | Wireless headset | 04/15/2008 |
| D565033 | Wireless headset | 03/25/2008 |
| D564501 | Base unit with a headset | 03/18/2008 |
| D494957 | Headset | 08/24/2004 |
| 6191650 | Class d amplifier with pulse width modulation and a very low power consumption The invention concerns a class D amplifier in which a high-frequency reference signal is pulse width modulated by an input signal, such as an audio signal, and in which there are generated a pair of bipolar pulse drive signals, comprising an error generat... | 02/20/2001 |
