Portfolio comparison
Hamilton Watch Co vs Energy Partners Inc
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Hamilton Watch Co
Patents indexed
1
Year range
1972
Most recent
1972
consumer_electronicssemiconductorssoftware
Top Patents1 enriched
US 3672155· 1972
Hamilton's Early Digital Watch with LED Display
Activity by Decade
1970s1
Top Patents1 enriched
US 5346778· 1994
Boosting Fuel Cell Power for Vehicles Using Oxygen Injection
Activity by Decade
1990s1
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