For the Inventor, By the Inventor

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Torrance, CA, United States of America

Phonemate, Inc.

USPTO Granted Patents = 19

Forward Citations = 526

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17 inventors (with patents filed for the assignee):

Stephen B Knuth (6 out of 14 patents)

David A Sharbaugh (5 out of 11 patents)

Kenneth R Core (4 out of 6 patents)

4. Mark Karnowski (3 out of 6 patents)

5. Alastair W Jarrett (3 out of 4 patents)

6. Mark J Karnowski (3 out of 17 patents)

7. Oded Yossifor (2 out of 3 patents)

8. Eskandar Afshar (2 out of 3 patents)

9. Michinari Ueki (2 out of 2 patents)

10. James W Oblak (2 out of 2 patents)

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

12. Benjamin H Stansbury, Jr (1 out of 29 patents)

13. Pierluigi Pacciardi (1 out of 1 patent)

14. Sanford M Brown, Iii (1 out of 4 patents)

15. Neal Buglewicz (1 out of 1 patent)

19 patents: Sort by Forward Citations

1. D372717 - Telephone answering device base unit (1996-08-13),

2. 5432844 - Shared line answering system with enhanced extension device features (1995-07-11),

3. 5432836 - Interchangeable base arrangement for wall mount/desk mount telephone (1995-07-11),

4. 5418839 - Environmental adaptive mechanism for channel utilization in cordless (1995-05-23),

5. 5406618 - Voice activated, handsfree telephone answering device (1995-04-11),

6. 5400393 - Voice mail digital telephone answering device (1995-03-21),

7. D356087 - Combined telephone, telephone handset and telephone answering device (1995-03-07),

8. 5392332 - Shared line telephone answering system with a telephone line-powered (1995-02-21),

9. 5313516 - Telephone answering device with automatic function (1994-05-17),

10. 5289529 - Means for improving the dynamic range of an analog/digital converter in (1994-02-22),

11. 5197093 - Enviromental adaptive mechanism for channel utilization in cordless (1993-03-23),

12. 5111500 - Handset or speaker message retrieval system (1992-05-05),

13. D316409 - Cordless handset telephone (1991-04-23),

14. D316024 - All digital telephone answering device (1991-04-09),

15. D315730 - Cordless telephone answering set (1991-03-26),

Phonemate, Inc. is a leading provider of telecommunications solutions, specializing in phone systems for businesses of all sizes. With a focus on innovation and customer service, Phonemate offers a range of products and services to help companies improve communication and efficiency. From traditional landline systems to cutting-edge VoIP technology, Phonemate has the expertise to meet the unique needs of each client.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

19 Patents

#31 in Torrance, CA

#4,094 in California

#17,113 in US

#32,592 in the World

Torrance, CA, United States of America

Phonemate, Inc.

Forward Citations = 526

17 inventors:

Stephen B Knuth (6 out of 14 patents)

David A Sharbaugh (5 out of 11 patents)

Kenneth R Core (4 out of 6 patents)

4. Mark Karnowski (3 out of 6 patents)

5. Alastair W Jarrett (3 out of 4 patents)

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