Portfolio comparison
William F. Semple vs EVINRUDE MOTOR CO
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 98304· 1869
William Semple's 1869 Patent for Improved Chewing Gum
Activity by Decade
1860s1
Top Patents1 enriched
US 1001260· 1911
How Ole Evinrude Invented the Modern Portable Outboard Motor
Activity by Decade
1910s1
How to use
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