Digital Recorders, Inc.
Patent Owner
Stats
- 2 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jul 13, 2010 most recent publication
Details
- 2 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 92 Total Citation Count
- Nov 04, 1999 Earliest Filing
- 4 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
7756132 Rapid messaging protocol wireless network data communication systemExpiredDec 13, 06Jul 13, 10[G06F]
2007/0115,109 SECURITY SYSTEM AND METHOD FOR MASS TRANSIT VEHICLESAbandonedSep 01, 06May 24, 07[G08B]
7068795 Public address system and method for an urban transit vehicleExpiredApr 16, 03Jun 27, 06[H04R]
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