Portfolio comparison
Elias Howe vs Sperry Rand Corp
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 4750· 1846
How Elias Howe Invented the Modern Lockstitch Sewing Machine
Activity by Decade
1840s1
Top Patents1 enriched
US 3120606· 1964
How the ENIAC Computer Processes Data Using Electronic Pulses
Activity by Decade
1960s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.