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For the Inventor, By the Inventor

Westford, MA, United States of America

Digital Voice Systems, Inc.


USPTO Granted Patents = 45

% Expired Patents = 6.7



Forward Citations = 1,706

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7 inventors (with patents filed for the assignee):

goldMedal John C Hardwick (38 out of 38 patents)

silverMedal Jae S Lim (14 out of 48 patents)

bronzeMedal 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:
Digital Speech
Audio Watermarking
Vocoder
Speech Coding
Parameter Estimation
Quantization
Acoustic Signals
Error Correction
Signal Processing
Speech Enhancement
Tone Frame Detection
Transmission Methods

45 patents:

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),
Company Overview
Digital Voice Systems, Inc., based in Westford, MA, specializes in advanced audio processing technologies. The company focuses on developing solutions in areas such as bit error correction, speech model parameter estimation, and audio watermarking. Their expertise extends to vocoders, including half-rate and interoperable vocoders, as well as voice transcoding and digital audio server technologies. By innovating in speech coding and related domains, Digital Voice Systems aims to enhance communication quality and efficiency across various applications.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

45 Patents

#7 in Westford, MA

#440 in Massachusetts

#7,781 in US

#15,436 in the World

Westford, MA (US)
Westford, MA, United States of America

Digital Voice Systems, Inc.

Forward Citations = 1,706

7 inventors:

goldMedal John C Hardwick (38 out of 38 patents)

silverMedal Jae S Lim (14 out of 48 patents)

bronzeMedal 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)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Digital Voice Systems, Inc.. Retrieved from https://idiyas.com/company/digital-voice-systems

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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