Portfolio comparison
Elisha G. Otis vs JEFFERSON MEDICAL COLLEGE
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 31128· 1861
How Elisha Otis Invented the Modern Safety Elevator
Activity by Decade
1860s1
Top Patents1 enriched
US 2702035· 1955
How the First Heart-Lung Machine Oxygenated Blood
Activity by Decade
1950s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.