5 Utility and 48 Design Patents
#22 in Chicago, IL
#82 in Illinois
#1,366 in US
#2,250 in the World
rank by design patentsForward Citations = 2,846
Company Filing History:


4. 4 out of 1,255

5. 4 out of 4
Talk-a-phone Co.
where one patent can have more than one assignee
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