D. Frederic Proctor

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Redmond, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electronic telephone ringer including anti-bell tap provisions
- Patent number 4,367,376
- Issue date Jan 4, 1983
- Proctor & Associates Co.
- D. Frederic Proctor
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Telephone line lifting apparatus
- Patent number 4,126,771
- Issue date Nov 21, 1978
- Proctor & Associates Company
- D. Frederic Proctor
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for automatically identifying an individual ca...
- Patent number 4,099,031
- Issue date Jul 4, 1978
- Proctor & Associates Company
- D. Frederic Proctor
- H04 - ELECTRIC COMMUNICATION TECHNIQUE