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David A. Hancock
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Seattle, WA, US
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Patents Grants
last 30 patents
Information
Patent Grant
Pneumatic signaling device for scuba divers
Patent number
8,973,516
Issue date
Mar 10, 2015
David A. Hancock
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information
Patent Grant
Pneumatic signaling device for divers
Patent number
6,796,265
Issue date
Sep 28, 2004
Ideations Design, Inc.
James T. Dexter
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information
Patent Grant
Pneumatic signaling device for divers
Patent number
6,578,511
Issue date
Jun 17, 2003
James T. Dexter
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information
Patent Grant
Audible alarm device for divers and others
Patent number
5,106,236
Issue date
Apr 21, 1992
David A. Hancock
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information
Patent Grant
Audible alarm device for divers
Patent number
4,950,107
Issue date
Aug 21, 1990
David A. Hancock
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Patents Applications
last 30 patents
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Patent Application
PNEUMATIC SIGNALING DEVICE FOR SCUBA DIVERS
Publication number
20130269590
Publication date
Oct 17, 2013
David A. Hancock
G08 - SIGNALLING