Portfolio comparison
ELECTRO STRING INSTR CORP vs EMI Ltd
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
ELECTRO STRING INSTR CORP
Patents indexed
1
Year range
1937
Most recent
1937
consumer_electronicsmechanical
Top Patents1 enriched
US 2089171· 1937
How the Frying Pan Guitar Created the Electric Guitar
Activity by Decade
1930s1
Top Patents1 enriched
US 3778614· 1973
How Early CT Scans Created Detailed Body Images
Activity by Decade
1970s1
How to use
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