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Class Information
Number: 116/113
Name: Signals and indicators > Alarms > Shoal water
Description: Devices include systems based upon the varying depth of water, used on moving vessels to give warning when the water is shoaling.

Patents under this class:

Patent Number Title Of Patent Date Issued
6380863 Signal flag and signalling system for motor racing Apr. 30, 2002
5854180 Environmentally improved acid corrosion inhibitor Dec. 29, 1998
5701833 Method and apparatus for sewing cloth pieces in a series to continuous slide fastener chain Dec. 30, 1997
4873523 Shallow water indicator for a boat Oct. 10, 1989

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