80 Utility and 2 Design Patents
#3 in Wellesley, MA
#315 in Massachusetts
#8,346 in US
#15,221 in the World
rank by utility patentsForward Citations = 1,079
Company Filing History:

Royal Appliance Mfg., Co.

4. 10 out of 29

5. 9 out of 10

where one patent can have more than one assignee
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