Keyboard Patents

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A gallery of patents that describe technologies or illustrate designs relating to IBM and family keyboards, typewriters and keypunches. This includes keyswitch/actuator designs, ornamental designs (overall appearance), integrated pointing devices such as TrackPoints, and host systems such as PCs, laptops, terminals, consoles and electronic typewriters. All illustrations provided are from the patents themselves, which are believed to be within the public domain. A total of 112 patents have been recorded. The patent list is currently filtered to 1 patent(s).

U.S. Utility Patent 5,298,706 (US5298706A)

Patent diagrams depicting Key Tronic's membrane computer keyboard and improved key structure at rest (left) and pressed (right)

Applied 13 Aug 1992

Published 29 Mar 1994

Expired 13 Aug 2012

More info

Name	Membrane computer keyboard and improved key structure
Inventors	George P. English, Stephen S. Damitio
Assignees	Key Tronic
Description	An invention of a low-cost, low-part-count membrane keyboard using a keyswitch with a buckling rubber sleeve-like tactile element. This patent is cited on the IBM ThinkPad 701-series (TrackWrite) and Power Series 800 keyboard assemblies.