Telenorma Telefonbau und Normalzeit GmbH
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jan 12, 1993 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 279 Total Citation Count
- Jan 23, 1987 Earliest Filing
- 9 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
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Recent Publications
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Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
4991167 Voice controlled attenuation adjustment in telephone transmission circuitsExpiredFeb 06, 89Feb 05, 91[H04J]
4937858 Telephone handset with electro-acoustic converters electrically connected by a cordExpiredAug 05, 88Jun 26, 90[H04M]
4813072 Switching device for power supply to additional accessories for a telephoneExpiredMay 28, 87Mar 14, 89[H04M]
4782522 Terminal for a telecommunications switching system having an additional keyboard and/or visual displayExpiredJan 23, 87Nov 01, 88[H04M]
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