Portfolio comparison
Hovercraft Development Ltd vs Battelle Development Corp
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
Battelle Development Corp
Patents indexed
1
Year range
1970
Most recent
1970
consumer_electronicsmechanicaltelecommunications
Top Patents1 enriched
US 3501586· 1970
How James Russell Invented the Digital Optical Disc
Activity by Decade
1970s1
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