Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 5824938 | Velocity sensing trigger interface for musical instrument An electronic instrument which generates sound using a sound generator upon receipt of a trigger signal. Each pad actuator for generating a trigger signal includes first and second actuators for respectively triggering first and second switches which, upo... | 10/20/1998 |
| 5790837 | Method and system for device virtualization based on an interrupt request in a dos-based environment A technique for providing device virtualization in an MS-DOS based operating environment, using an interrupt request (e.g., a non-maskable interrupt), is described. The technique includes executing an application on a processor within the MS-DOS based ope... | 08/04/1998 |
| 5537477 | Frequency characteristic shaping circuitry and method Frequency characteristic shaping circuitry having a plurality of bandpass filters to which an audio signal is supplied and a plurality of variable gain attenuators individually associated with the bandpass filters. The output signals of the variable gain ... | 07/16/1996 |
| 5321758 | Power efficient hearing aid A power efficient hearing aid uses a programmable biasing technique to set the quiescent operating points of amplifiers used by the hearing aid to avoid excessive power usage by the hearing aid. The hearing aid also includes power supply circuitry which d... | 06/14/1994 |
| 5195139 | Hearing aid A hearing aid in which selected frequency components of sound being vented from the ear canal of the user of the hearing aid to eliminate the "occlusion effect" are conducted to an acoustically isolated cavity to eliminate, or greatly reduce, feedback in ... | 03/16/1993 |
| 5111506 | Power efficient hearing aid A power efficient hearing aid uses a programmable biasing technique to set the quiescent operating points of amplifiers used by the hearing aid to avoid excessive power usage by the hearing aid. The hearing aid also includes power supply circuitry which d... | 05/05/1992 |
