Tunstall Telecom Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5129096 System which routes radio transmissions to selected repeaters for retransmissionExpiredMay 04, 90Jul 07, 92[H04B]
D310219 Master unit for an intercommunication systemExpiredNov 12, 87Aug 28, 90[]
D307739 Remote controlExpiredJul 21, 87May 08, 90[]
D307273 Speech module for an intercommunication systemExpiredNov 12, 87Apr 17, 90[]
4881252 Sheltered housing scheme communications systemExpiredJun 15, 88Nov 14, 89[H04M]

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