Wilmington, MA, United States of America

Analog and Digital Systems, Inc.

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USPTO Granted Patents = 6

Forward Citations = 101

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6 inventors (with patents filed for the assignee):

Richard E DeFreitas (3 out of 10 patents)

Daniel T Sullivan (2 out of 7 patents)

Michael L Kelly (1 out of 1 patent)

4. Norbert Lagerbauer (1 out of 1 patent)

5. Dietmar Adler (1 out of 1 patent)

6. Peter Hartwein (1 out of 25 patents)

6 patents: Sort by Forward Citations

1. 4745397 - Remote control devices (1988-05-17),

2. 4730272 - Audio delay system (1988-03-08),

3. 4682362 - Generating narrowly-separated variable-frequency clock signals (1987-07-21),

4. 4612654 - Digital encoding circuitry (1986-09-16),

5. 4507800 - Enclosed magnet loudspeaker (1985-03-26),

6. 4303800 - Reproducing multichannel sound (1981-12-01),

Company Overview

Analog and Digital Systems, Inc. is a leading provider of integrated technology solutions for businesses. With expertise in both analog and digital systems, we offer a wide range of products and services to help our clients streamline their operations and improve efficiency. Our team of experienced professionals is dedicated to delivering high-quality, innovative solutions that meet the unique needs of each of our customers. Visit our website to learn more about how Analog and Digital Systems can help your business succeed.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

6 Patents

#43 in Wilmington, MA

#2,548 in Massachusetts

#45,030 in US

Wilmington, MA, United States of America