28 Utility and 3 Design Patents
#144 in Phoenix, AZ
#842 in Arizona
#50,626 in US
#98,005 in the World
rank by utility patentsForward Citations = 489
Company Filing History:
Other
Irwin-industrial Tool Company
American Tool Companies, Inc.
4. 2 out of 3
William Zinsser & Co., Incorporated
5. 2 out of 2
Blackhawk Metal Products, Inc.
where one patent can have more than one assignee
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