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http://www.google.co.uk/patents/US3535479?utm_source=gb-gplus-share
Patent US3535479 - TIME DELAY PRESSURE SWITCH
TIME DELAY PRESSURE SWITCH
William H. Smyers et al
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 3535479
Filing date
: 7 Jun 1968
Issue date
: 20 Oct 1970
Inventors
:
William H. Smyers
,
William H. Smyers
Current U.S. Classification
:
200/83.00T
;
92/37
View patent at USPTO
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US4795888
13 Jul 1987
3 Jan 1989
A & K MacFarlane Pty. Ltd.
Variable keystroke pressure apparatus
US5152670
19 Apr 1990
6 Oct 1992
Sump system
Drawings
Drawings
Drawings
