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San Francisco, CA, United States of America

Pacific Bell

Calculating rank

USPTO Granted Patents = 43

CIPO Patents = 1

Forward Citations = 1,371

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38 inventors (with patents filed for the assignee):

Daniel P Lubarsky (7 out of 8 patents)

James E Kohl (5 out of 11 patents)

John J Schembri (5 out of 5 patents)

4. Gregg D Carse (5 out of 5 patents)

5. Mark E Haisch (4 out of 4 patents)

6. William P Kornrumpf (3 out of 76 patents)

7. George A Weigt (3 out of 3 patents)

8. Ning Zhang (3 out of 3 patents)

9. Bernard N Daines (3 out of 3 patents)

10. John D Harnden, Jr (2 out of 29 patents)

11. Michael S Adler (2 out of 18 patents)

12. Dominic A Cusano (2 out of 34 patents)

13. Donald L Watrous (2 out of 21 patents)

14. Edward C Posner (2 out of 3 patents)

15. Robert S Scott (2 out of 7 patents)

Core Competencies:

Fiber Optic Distribution

Packet Routing

Telephone Network Testing

Digital Service Unit

Piezoelectric Relay

Cross-Connect Switch

Error Correcting Code

Hybrid Database Structure

Telephone Lottery Play

Remote Multiplexer

Digital Network

Modulated Banyan Network

43 patents: Sort by Forward Citations

1. 5848144 - Switch cutover with paced transition (1998-12-08),

2. 5452206 - Method for generating documentation for computer software (1995-09-19),

3. 5386525 - System for providing application programs with direct addressability (1995-01-31),

4. 5357556 - System and method for telephone network testing (1994-10-18),

5. 5327485 - Telephone lottery play system (1994-07-05),

6. 5295261 - Hybrid database structure linking navigational fields having a (1994-03-15),

7. 5216853 - Telephone enclosure (1993-06-08),

8. 5216668 - Modulated nonblocking parallel banyan network (1993-06-01),

9. 5132965 - Nonblocking parallel Banyan network (1992-07-21),

10. 5124943 - Digital network utilizing telephone lines (1992-06-23),

11. 5093600 - Piezo-electric relay (1992-03-03),

12. 5065394 - Packet routing switch (1991-11-12),

13. 5062104 - Digital service unit for connecting data processing equipment to a (1991-10-29),

14. 5058163 - Interface unit for transferring digital data between time-domain (1991-10-15),

15. 5023612 - Illegal sequence detection and protection circuit (1991-06-11),

Company Overview

Pacific Bell, headquartered in San Francisco, CA, specializes in advanced telecommunications technologies. The company focuses on developing and optimizing telephone network testing methodologies, hybrid database structures, and digital network solutions. Its expertise extends to fiber optic distribution, error correcting codes, and innovative relay technologies such as piezoelectric relays. Additionally, Pacific Bell is involved in the design and implementation of packet routing and cross-connect switches, enhancing the efficiency and reliability of communication networks.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

43 Patents

#107 in San Francisco, CA

#1,903 in California

#8,108 in US

#16,056 in the World

San Francisco, CA, United States of America

Pacific Bell

Forward Citations = 1,371

38 inventors:

Daniel P Lubarsky (7 out of 8 patents)

James E Kohl (5 out of 11 patents)

John J Schembri (5 out of 5 patents)

4. Gregg D Carse (5 out of 5 patents)

5. Mark E Haisch (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Pacific Bell. Retrieved from https://idiyas.com/company/pacific-bell

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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