4 ms·
Those patents are expiring soon. http://www.google.com/patents/US5521596 http://www.google.com/patents/US5521596 - Analog input device located in the primary t
by benmccann 14y ago
Those patents are expiring soon.
http://www.google.com/patents/US5521596 http://www.google.com/patents/US5521596 - Analog input device located in the primary typing area of a keyboard - Expires May 28, 2013
http://www.google.com/patents/US5489900 http://www.google.com/patents/US5489900 -
Force sensitive transducer for use in a computer keyboard - Expires Jun 3, 2014