For the Inventor, By the Inventor

Enter assignee name

Torrance, CA, United States of America

Casio Phonemate, Inc.

USPTO Granted Patents = 18

Forward Citations = 313

Loading Chart...

Loading Chart...

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),

Casio Phonemate, Inc. is a leading provider of telecommunications solutions for businesses. With a focus on innovative phone systems and cutting-edge technology, Casio Phonemate offers a range of products to streamline communication and enhance collaboration. Their services include VoIP solutions, IP PBX systems, and call center solutions, all designed to improve efficiency and productivity for their clients.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

18 Patents

#33 in Torrance, CA

#4,278 in California

#17,933 in US

#34,146 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)

Please report any incorrect information to [email protected]

Loading…