15 Utility and 4 Design Patents
#10,270 in Tokyo
#53,140 in Japan
#247,062 in the World
rank by utility patentsForward Citations = 138
Company Filing History:

Quarrymen & Co. Inc.

4. 4 out of 45

5. 2 out of 945

where one patent can have more than one assignee
Get your Inventor Badge Today