Portfolio comparison
Nat Res Dev vs Elisha G. Otis
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 2799449· 1957
How Alan Turing Designed Early Computer Memory Systems
Activity by Decade
1950s1
Top Patents1 enriched
US 31128· 1861
How Elisha Otis Invented the Modern Safety Elevator
Activity by Decade
1860s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.