08587405 is referenced by 28 patents and cites 202 patents.

An electronic access control device is disclosed comprising two microprocessors. The first microprocessor receives a wirelessly transmitted that is compared to a stored access code. If those two codes match, the first microprocessor transmits a special communication code to the second microprocessor. The second microprocessor opens the lock if the transmitted communication code matches a stored communication code.

Title
Electronic access control device
Application Number
11/137257
Publication Number
8587405 (B2)
Application Date
May 25, 2005
Publication Date
November 19, 2013
Inventor
Lawrence Brownfield
Downers Grove
IL, US
Bradley S Silvers
Oswego
IL, US
William D Denison
Lake Zurich
IL, US
Agent
Miller Matthias & Hull
Assignee
O S Security
TX, US
IPC
H04L 9/32
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