65 Utility Patents
#217 in San Francisco, CA
#4,105 in California
#12,551 in US
#23,283 in the World
Forward Citations = 823
Company Filing History:


Other
4. 4 out of 17
Envirotest Systems Corporation
5. 3 out of 18
Environmental Systems Products Holdings Inc.
where one patent can have more than one assignee
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