For the Inventor, By the Inventor

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Westford, MA, United States of America

Digital Voice Systems, Inc.

USPTO Granted Patents = 45

% Expired Patents = 6.7

CIPO Patents = 3

EPO Patents = 3

Forward Citations = 1,706

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7 inventors (with patents filed for the assignee):

John C Hardwick (38 out of 38 patents)

Jae S Lim (14 out of 48 patents)

Daniel W Griffin (12 out of 13 patents)

4. Thomas Clark (5 out of 25 patents)

5. Timothy E Kalvaitis (1 out of 1 patent)

6. William S McKinney (1 out of 1 patent)

7. Brian D Clooney (1 out of 1 patent)

Core Competencies:

Bit Error Correction

Speech Model Parameter Estimation

Audio Watermarking

Half-Rate Vocoder

Interoperable Vocoder

Voice Transcoder

Digital Audio Server

Speech Coding

Spectral Magnitude Representation

Digital Transmission

Speech Enhancement

Quantization Methods

45 patents: Sort by Forward Citations

1. 12706105 - Reducing perceived effects of non-voice data in digital speech (2026-08-11),

2. 12694884 - Voicing smoother (2026-07-28),

3. 12462814 - Bit error correction in digital speech (2025-11-04),

4. 12451151 - Tone frame detector for digital speech (2025-10-21),

5. 12254895 - Detecting and compensating for the presence of a speaker mask in a speech signal (2025-03-18),

6. 11990144 - Reducing perceived effects of non-voice data in digital speech (2024-05-21),

7. 11715477 - Speech model parameter estimation and quantization (2023-08-01),

8. 11270714 - Speech coding using time-varying interpolation (2022-03-08),

9. 11244692 - Audio watermarking via correlation modification using an amplitude and a magnitude modification based on watermark data and to reduce distortion (2022-02-08),

10. 10210875 - Audio watermarking via phase modification (2019-02-19),

11. 9990928 - Audio watermarking via phase modification (2018-06-05),

12. 8595002 - Half-rate vocoder (2013-11-26),

13. 8433562 - Speech coder that determines pulsed parameters (2013-04-30),

14. 8359197 - Half-rate vocoder (2013-01-22),

15. 8315860 - Interoperable vocoder (2012-11-20),

Digital Voice Systems, Inc. (DVSI) is a leading provider of voice compression and communication technologies. Since 1990, DVSI has been developing innovative solutions that enable efficient and reliable voice communication over various networks. Their expertise includes state-of-the-art speech compression algorithms, robust error correction techniques, and advanced voice processing technologies. DVSI's solutions are widely used in applications such as mobile communications, satellite systems, secure voice transmission, and public safety communications. With a strong commitment to quality and customer satisfaction, DVSI continues to develop cutting-edge solutions that meet the evolving needs of the telecommunications industry.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

45 Patents

#7 in Westford, MA

#439 in Massachusetts

#7,759 in US

#15,393 in the World

Westford, MA, United States of America

Digital Voice Systems, Inc.

Forward Citations = 1,706

7 inventors:

John C Hardwick (38 out of 38 patents)

Jae S Lim (14 out of 48 patents)

Daniel W Griffin (12 out of 13 patents)

4. Thomas Clark (5 out of 25 patents)

5. Timothy E Kalvaitis (1 out of 1 patent)

Please report any incorrect information to [email protected]

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