8 Utility Patents
#19,518 in Tokyo
#106,576 in Japan
#514,027 in the World
Forward Citations = 36
Company Filing History:

Chemical Grouting Company, Ltd.

4. 1 out of 35,403

5. 1 out of 2
Sumitomo Cement Kabushiki Kaisha
where one patent can have more than one assignee
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