Portfolio comparison
Lewis E. Waterman vs MAY B CORNWALL
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 1469997· 1923
A 1920s Design for a Suspended Monorail Transportation System
Activity by Decade
1920s1
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