John W. Sloan

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Phoenix, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
System for detecting the siren of an approaching emergency vehicle
- Patent number 5,287,411
- Issue date Feb 15, 1994
- James L. Hill
- G08 - SIGNALLING
Information Patent Grant
Method and apparatus for monitoring status of tables in a restaurant
- Patent number 4,222,111
- Issue date Sep 9, 1980
- Johnston; Sherwood
- John W. Sloan
- G08 - SIGNALLING