Portfolio comparison
Lewis E. Waterman vs Energy Partners Inc
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 5346778· 1994
Boosting Fuel Cell Power for Vehicles Using Oxygen Injection
Activity by Decade
1990s1
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