Portfolio comparison
LaMarcus A. Thompson vs Guglielmo Marconi
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 310966· 1885
Early Roller Coaster Design for Thrill Rides
Activity by Decade
1880s1
Top Patents1 enriched
US 586193· 1897
How Marconi Patented Early Wireless Telegraphy Signals
Activity by Decade
1890s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.