Portfolio comparison
Lewis E. Waterman vs George B. Selden
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Lewis E. Waterman
Patents indexed
1
Year range
1884
Most recent
1884
mechanicalconsumer_goodsmanufacturing
Top Patents1 enriched
US 293545· 1884
How Lewis Waterman's Original Fountain Pen Design Worked
Activity by Decade
1880s1
Top Patents1 enriched
US 549160· 1895
George Selden's 1895 Patent for a Road Engine
Activity by Decade
1890s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.