CIPO Patents = 1

Trademarks = 1

Forward Citations = 695

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5 inventors (with patents filed for the assignee):

Robert L Brennan (5 out of 25 patents)

Anthony Todd Schneider (5 out of 21 patents)

Edward Chau (1 out of 3 patents)

4. Todd Schneider (1 out of 32 patents)

5. Hamid Sheikhzadeh Nadjar (1 out of 5 patents)

6. Edward Y Chau (0 patent)

6 patents: Sort by Forward Citations

1. 7359520 - Directional audio signal processing using an oversampled filterbank (2008-04-15),

2. 6606391 - Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signals in hearing aids (2003-08-12),

3. 6347148 - Method and apparatus for feedback reduction in acoustic systems, particularly in hearing aids (2002-02-12),

4. 6240192 - Apparatus for and method of filtering in an digital hearing aid, including an application specific integrated circuit and a programmable digital signal processor (2001-05-29),

5. 6236731 - Filterbank structure and method for filtering and separating an information signal into different bands, particularly for audio signal in hearing aids (2001-05-22),

6. 6115478 - Apparatus for and method of programming a digital hearing aid (2000-09-05),

Company Overview

Dspfactory Ltd. is a leading provider of digital signal processing solutions for a wide range of industries. With a focus on innovation and quality, we offer a comprehensive suite of products and services to meet the needs of our clients. Our team of experts is dedicated to delivering cutting-edge technologies and superior customer support to ensure the success of our clients' projects. Visit our website to learn more about our offerings and how we can help you achieve your goals.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

6 Patents

#57 in Waterloo, Ontrio

#2,416 in Canada

Waterloo, Ontrio, Canada

Dspfactory Ltd.

Forward Citations = 695

5 inventors:

Robert L Brennan (5 out of 25 patents)

Anthony Todd Schneider (5 out of 21 patents)

Edward Chau (1 out of 3 patents)

4. Todd Schneider (1 out of 32 patents)

5. Hamid Sheikhzadeh Nadjar (1 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Dspfactory Ltd.. Retrieved from https://idiyas.com/company/dspfactory

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]

1 patent (CIPO):

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]