Portfolio comparison
Marvin C. Stone vs Universidad Austral de Chile
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 8062633· 2011
Using Bacteria to Kill Food-Poisoning Germs on Kitchen Surfaces
Activity by Decade
2010s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.