Inventor
BUYAK WILLIAM P
US6 patents
Patents
6 patentsUS4952906AAug 28, 1990
Strobe alarm circuit
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US4954805ASep 4, 1990
Piezo electronic horn
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US4736197AApr 5, 1988
Transit system third rail warning signal
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US4929924AMay 29, 1990
Electronic alarm horn
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US4864275ASep 5, 1989
Solenoid operated doorbell
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US4628213ADec 9, 1986
Electronic circuits for driving bells or electromagnetic devices
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