Portfolio comparison
Wham O Manufacturing Co vs Henry W. Seely
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Wham O Manufacturing Co
Patents indexed
1
Year range
1967
Most recent
1967
mechanicalconsumer_electronics
Top Patents1 enriched
US 3359678· 1967
How the Modern Frisbee Design Works
Activity by Decade
1960s1
Top Patents1 enriched
US 259054· 1882
Henry Seely's 1882 Electric Flatiron
Activity by Decade
1880s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.