% Expired Patents = 20.0

EPO Patents = 1

Forward Citations = 62

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4 inventors (with patents filed for the assignee):

Donald Murray Clucas (5 out of 7 patents)

Murray Aitken (1 out of 4 patents)

Geoffrey James Mentink (1 out of 2 patents)

4. Rangi Amila Joshua De Abaffy (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 7168234 - Recuperative heater for an external combustion engine (2007-01-30),

2. 6637312 - Assembly and mounting of an engine drive mechanism (2003-10-28),

3. 6525431 - Co-generation system employing a stirling engine (2003-02-25),

4. 6220030 - Stirling engine burner (2001-04-24),

5. 5630351 - Wobble yoke assembly (1997-05-20),

Company Overview

Whisper Tech Limited is a leading technology company specializing in innovative solutions for communication and security. With a strong focus on privacy and data protection, we provide cutting-edge products and services that enable secure and confidential communication for our clients. Our team of experts is dedicated to delivering high-quality solutions that meet the evolving needs of our customers.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

5 Patents

#13 in Christchurch

#158 in New Zealand

Christchurch, New Zealand

Whisper Tech Limited

Forward Citations = 62

4 inventors:

Donald Murray Clucas (5 out of 7 patents)

Murray Aitken (1 out of 4 patents)

Geoffrey James Mentink (1 out of 2 patents)

4. Rangi Amila Joshua De Abaffy (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Whisper Tech Limited. Retrieved from https://idiyas.com/company/whisper-tech

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 (EPO):

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]