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Attorney: Lukasik; Susan L., Parmelee; Steven G., Jenski; Raymond A.


Number of patents: 3
Last date: February 01, 1994

NumberTitleIssue Date
5283546Vandal-resistant call box
A call box (201) provides vandal-resistant operation by using a concealed magnetic switch and magnet (179) and specially locked compartments (101 and 103) in a heavy duty structure. The concealed magnetic switch determines the position of a handset (119) ...
02/01/1994
5191607Ring tone muting with disable
A communication control console center, able to receive at least one phone call, has a ring tone mute button (103). To prevent indefinite or permanent muting of ring tones automatic disabling of the ring tone mute circuit is provided by a programmable tim...
03/02/1993
5173938Key management system
This key management system effectively solves the key distribution problems of distance, time, operator error, and security risk by transferring encryption keys with appropriate system information between a key management controller (101) and a remote key...
12/22/1992
 
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