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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Lake; Don W.
Address:
Cupertino, CA
No. of patents:
4
Patents:












Patent Number Title Of Patent Date Issued
4178487 Switch selector and actuator December 11, 1979
Disclosed is a switch selector and actuator for use with a telephone repertory dialer and the like where a plurality of contacts are arranged in a row. A rail member is mounted in close proximity to the row of switch contacts and is yieldably biased away from the contacts. A selector mem
4142184 Digital multitone generator for telephone dialing February 27, 1979
A digital signal generator that produces multi-frequency tones in the voice band range for use in telephone station sets utilizing multitone dialing. Amplitude information describing each of eight voice band frequencies is digitally encoded into a sequence of multi-bit words describing t
4132871 Digitally synthesized multi-frequency signal generator January 2, 1979
A solid state signal generator for producing frequency combinations such as used in multi-tone telephone systems. The output of a crystal oscillator is divided to obtain binary signals proportional to the selected pairs of the seven multi-tone frequencies. These signals are scaled with s
4058805 Digital multitone generator for telephone dialing November 15, 1977
A digital signal generator that produces multifrequency tones in the voice band range for use in telephone station sets utilizing multitone dialing. Amplitude information describing each of eight voice band frequencies is digitally encoded into a sequence of multi-bit words describing th










 
 
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