27 Utility and 1 Design Patents
#2,480 in Kanagawa
#23,296 in Japan
#108,395 in the World
rank by utility patentsForward Citations = 272
Company Filing History:
Schlumberger Technology Corporation
Asahi Denka Kogyo K.k.

4. 1 out of 121

5. 1 out of 119

where one patent can have more than one assignee
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