17 Utility Patents
#92 in The Woodlands, TX
#7,141 in Texas
#105,549 in US
#209,479 in the World
Forward Citations = 155
Company Filing History:
Duhn Oil Tool, Inc.
Seaboard International Inc.
Other
4. 1 out of 22
Shell Western E&p Inc.
5. 1 out of 1
Duhn Industries
where one patent can have more than one assignee
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