For the Inventor, By the Inventor

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Petaluma, CA, United States of America

Castle Tool Machinery, Incorporated

USPTO Granted Patents = 3

Forward Citations = 62

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1 inventor (with patents filed for the assignee):

Max W Durney (3 out of 43 patents)

3 patents: Sort by Forward Citations

1. 5676498 - In-line multiple spindle boring apparatus (1997-10-14),

2. 5649796 - Carbide spade-type drill bit (1997-07-22),

3. 5553645 - Drilling and counterboring apparatus and method for forming screw pockets (1996-09-10),

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USPTO Data Jan 1 1976 - Oct 6 2026

3 Patents

#52 in Petaluma, CA

#16,847 in California

#73,815 in US

Petaluma, CA, United States of America

Castle Tool Machinery, Incorporated

Forward Citations = 62

1 inventor:

Max W Durney (3 out of 43 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Castle Tool Machinery, Incorporated. Retrieved from https://idiyas.com/company/castle-tool-machinery

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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