CIPO Patents = 1

Trademarks = 1

Forward Citations = 57

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2 inventors (with patents filed for the assignee):

George Burgess (3 out of 4 patents)

Ernest W Pitches (1 out of 1 patent)

George Burgess (0 patent)

3 patents: Sort by Forward Citations

1. 5078903 - Pressure-fed drum filter separation apparatus with elongated, tangential (1992-01-07),

2. 4661252 - Rotary screen (1987-04-28),

3. 4236999 - Separation of solids from liquids by screening (1980-12-02),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

3 Patents

#105 in Auckland

#274 in New Zealand

Auckland, New Zealand

Contra-Shear Holdings Ltd.

Forward Citations = 57

2 inventors:

George Burgess (3 out of 4 patents)

Ernest W Pitches (1 out of 1 patent)

George Burgess (0 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Contra-Shear Holdings Ltd.. Retrieved from https://idiyas.com/company/contra-shear-holdings

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]