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For the Inventor, By the Inventor

Scotts Valley, CA, United States of America

E-Mu Systems, Inc.


USPTO Granted Patents = 17

Trademarks = 2

Forward Citations = 303

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10 inventors (with patents filed for the assignee):

goldMedal David P Rossum (10 out of 41 patents)

silverMedal Dana C Massie (2 out of 17 patents)

bronzeMedal Robert C Bliss (2 out of 2 patents)

4.  Pavl C Zachary (1 out of 1 patent)

5.  Roger A Cloud (1 out of 1 patent)

6.  John R Rossum, Jr (1 out of 2 patents)

7.  David R Frost (1 out of 1 patent)

8.  Donald Ruffcorn (1 out of 1 patent)

9.  Scott Wedge (1 out of 1 patent)

10.  D Scott Wedge (1 out of 1 patent)


17 patents:

1. 6111184 - Interchangeable pickup, electric stringed instrument and system for an (2000-08-29),
2. 5698803 - Digital sampling instrument employing cache memory (1997-12-16),
3. 5524074 - Digital signal processor for adding harmonic content to digital audio (1996-06-04),
4. 5430244 - Dynamic correction of musical instrument input data stream (1995-07-04),
5. 5342990 - Digital sampling instrument employing cache-memory (1994-08-30),
6. 5317104 - Multi-timbral percussion instrument having spatial convolution (1994-05-31),
7. 5303309 - Digital sampling instrument (1994-04-12),
8. 5298671 - Data compression of decaying musical instrument sounds for digital (1994-03-29),
9. 5248845 - Digital sampling instrument (1993-09-28),
10. 5170369 - Dynamic digital IIR audio filter and method which provides dynamic (1992-12-08),
11. 5144676 - Digital sampling instrument (1992-09-01),
12. 5111727 - Digital sampling instrument for digital audio data (1992-05-12),
13. 5072645 - Output stage for a multitimbral electronic musical instrument providing (1991-12-17),
14. 5013105 - Screwless electronic instrument enclosure (1991-05-07),
15. 4987600 - Digital sampling instrument (1991-01-22),
Company Overview
E-Mu Systems, Inc. is a technology company based in Scotts Valley, California, specializing in the development and manufacturing of innovative audio and music production equipment. The company is known for its pioneering work in digital sampling technology, synthesizers, and sound modules, catering to musicians, producers, and audio professionals. E-Mu's products are recognized for their high-quality sound and versatility, making significant contributions to the fields of music technology and digital audio processing.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

17 Patents

#15 in Scotts Valley, CA

#4,515 in California

#18,894 in US

#35,918 in the World

Scotts Valley, CA (US)
Scotts Valley, CA, United States of America

E-Mu Systems, Inc.

Forward Citations = 303

10 inventors:

goldMedal David P Rossum (10 out of 41 patents)

silverMedal Dana C Massie (2 out of 17 patents)

bronzeMedal Robert C Bliss (2 out of 2 patents)

4.  Pavl C Zachary (1 out of 1 patent)

5.  Roger A Cloud (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: E-Mu Systems, Inc.. Retrieved from https://idiyas.com/company/e-mu-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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