Portfolio comparison
ELECTRO STRING INSTR CORP vs Prodigy Services Co
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
Company B
Prodigy Services Co
Patents indexed
1
Year range
1994
Most recent
1994
telecommunicationssoftwareecommerceconsumer_electronics
Top Patents1 enriched
US 5347632· 1994
Prodigy's System for Interactive Online Information and Shopping
Activity by Decade
1990s1
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