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http://www.google.co.uk/patents/US3447766?utm_source=gb-gplus-share
Patent US3447766 - CONTROL STICK WITH SOLID STATE SENSORS
CONTROL STICK WITH SOLID STATE SENSORS
Raymond D. Palfreyman et al
Overview
Abstract
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Description
Claims
Patent number
: 3447766
Filing date
: 14 Feb 1967
Issue date
: 3 Jun 1969
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