Forward Citations = 163

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2 inventors (with patents filed for the assignee):

Dieter H Kallenbach (3 out of 15 patents)

Andries J Stoltz (1 out of 2 patents)

3 patents: Sort by Forward Citations

1. 4807318 - Suction operated cleaner (1989-02-28),

2. 4742593 - Valve member for water interruption pool cleaner (1988-05-10),

3. 4642833 - Valve assembly (1987-02-17),

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

3 Patents

#31 in Johannesburg

#126 in South Africa

Johannesburg, South Africa

Coxwold (Proprietary) Limited

Forward Citations = 163

2 inventors:

Dieter H Kallenbach (3 out of 15 patents)

Andries J Stoltz (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Coxwold (Proprietary) Limited. Retrieved from https://idiyas.com/company/coxwold-proprietary

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]