DIGITAL TELEPHONE SYSTEMS, INC.

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SAN RAFAEL, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Subscriber loop feed apparatus
- Patent number 4,197,431
- Issue date Apr 8, 1980
- Digital Telephone Systems, Inc.
- Herman Vis
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Trademarklast 30 trademarks

Information Trademark
73288857 - INN COM
- Serial number 73288857
- Registration number 1206023
- Filing date Dec 8, 1980
- Digital Telephone Systems, Inc.
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
73274633 - PROTOCALL
- Serial number 73274633
- Registration number 1248828
- Filing date Aug 18, 1980
- Digital Telephone Systems, Inc.
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72349166 - D
- Serial number 72349166
- Registration number 938583
- Filing date Jan 21, 1970
- DIGITAL TELEPHONE SYSTEMS, INC.
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
Information Trademark
72349167 - DIGITAL TELEPHONE SYSTEMS, INC. D
- Serial number 72349167
- Registration number 938584
- Filing date Jan 21, 1970
- DIGITAL TELEPHONE SYSTEMS, INC.
- 9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments