Portfolio comparison
Hovercraft Development Ltd vs Immersion
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Hovercraft Development Ltd
Patents indexed
1
Year range
1967
Most recent
1967
automotiveaerospacemechanicaltransportation
Top Patents1 enriched
US 3321037· 1967
How Hovercrafts Use Flexible Skirts to Ride on Air
Activity by Decade
1960s1
Company B
Immersion
Patents indexed
1
Year range
2017
Most recent
2017
consumer_electronicssoftwaretelecommunicationsautomotive
Top Patents1 enriched
US 9652041· 2017
Precisely Stopping Device Vibrations for Better Touch Feedback
Activity by Decade
2010s1
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