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Torrance, CA, United States of America

Casio Phonemate, Inc.

USPTO Granted Patents = 18

Forward Citations = 313

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12 inventors (with patents filed for the assignee):

Mark J Karnowski (12 out of 17 patents)

Stephen B Knuth (7 out of 14 patents)

Frank Sacca (4 out of 7 patents)

4. Sanford M Brown, Iii (3 out of 4 patents)

5. Alex Nirshberg (2 out of 2 patents)

6. James W Mazzolini (1 out of 5 patents)

7. Kenneth R Core (1 out of 6 patents)

8. Mark Karnowski (1 out of 6 patents)

9. Catherine Tsang (1 out of 1 patent)

10. Brady Guillame (1 out of 1 patent)

11. Grant M Mason (1 out of 1 patent)

12. David A Sharbaugh (1 out of 11 patents)

18 patents: Sort by Forward Citations

1. 6009165 - Full duplex speakerphone system (1999-12-28),

2. 5991632 - Cordless telephone and method of synchronization for secure, high-speed, (1999-11-23),

3. 5907596 - Calling party identification device with message function (1999-05-25),

4. D404732 - Telephone with display (1999-01-26),

5. 5826187 - Integrated cordless telephone with telephone answering device and method (1998-10-20),

6. 5825648 - Backup system for a time of day clock in an electronic device (1998-10-20),

7. 5781613 - Telephone answering device and method for screening incoming telephone (1998-07-14),

8. 5768364 - Software speakerphone system and method of operating a speakerphone (1998-06-16),

9. 5768349 - Voice mail telephone answering device (1998-06-16),

10. 5761271 - Telephone answering device with improved pager access feature (1998-06-02),

11. 5699421 - Telephone answering device with low cost dual tone multi-frequency (1997-12-16),

12. 5692042 - Speakerphone controlled by a comparator with hysteresis (1997-11-25),

13. 5680075 - Digital automatic gain control (1997-10-21),

14. 5646979 - Cordless telephone with voice announced calling party identification (1997-07-08),

15. 5606598 - Telephone answering device with direct telephone line interface (1997-02-25),

Company Overview

Casio Phonemate, Inc., based in Torrance, California, specializes in the development and manufacturing of advanced telecommunications equipment. The company is known for its innovative solutions in the field of voice messaging systems and answering machines, catering to both consumer and business markets. With a focus on enhancing communication technology, Casio Phonemate integrates user-friendly features and reliable performance into its products, positioning itself as a key player in the telecommunications industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

18 Patents

#33 in Torrance, CA

#4,293 in California

#17,974 in US

#34,244 in the World

Torrance, CA, United States of America

Casio Phonemate, Inc.

Forward Citations = 313

12 inventors:

Mark J Karnowski (12 out of 17 patents)

Stephen B Knuth (7 out of 14 patents)

Frank Sacca (4 out of 7 patents)

4. Sanford M Brown, Iii (3 out of 4 patents)

5. Alex Nirshberg (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Casio Phonemate, Inc.. Retrieved from https://idiyas.com/company/casio-phonemate

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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