Portfolio comparison
Marvin C. Stone vs MAY B CORNWALL
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 375962· 1888
How the Modern Paper Drinking Straw Was Invented
Activity by Decade
1880s1
Top Patents1 enriched
US 1469997· 1923
A 1920s Design for a Suspended Monorail Transportation System
Activity by Decade
1920s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.