65 Utility Patents
#618 in Kanagawa
#4,379 in Japan
#22,933 in the World
Forward Citations = 760
Company Filing History:


Mitsui Kensetsu Kabushiki Kaisha
4. 2 out of 1,033
Kabushiki Kaisha Topcon
5. 2 out of 2
Shiiai Kemutekku Kabushiki Kaisha
where one patent can have more than one assignee
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