Portfolio comparison
James L. Plimpton vs Research Corp
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
James L. Plimpton
Patents indexed
1
Year range
1863
Most recent
1863
mechanicalconsumer_electronics
Top Patents1 enriched
US 37305· 1863
How James Plimpton Invented the Modern Roller Skate
Activity by Decade
1860s1
Top Patents1 enriched
US 1948384· 1934
How Ernest Lawrence Invented the Cyclotron Particle Accelerator
Activity by Decade
1930s1
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