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Barbara P. Kelkhoff
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Aurora, IL, US
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last 30 patents
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Patent Grant
Movable barrier operator multi-technique excess force avoidance app...
Patent number
6,940,240
Issue date
Sep 6, 2005
The Chamberlain Group, Inc.
Barbara P. Kelkhoff
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Patents Applications
last 30 patents
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Patent Application
Movable barrier operator multi-technique excess force avoidance app...
Publication number
20040239275
Publication date
Dec 2, 2004
The Chamberlain Group, Inc.
Barbara P. Kelkhoff
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES