Portfolio comparison
Hookless Fastener Co vs Nat Res Dev
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Hookless Fastener Co
Patents indexed
1
Year range
1917
Most recent
1917
mechanicalconsumer_electronics
Top Patents1 enriched
US 1219881· 1917
How Gideon Sundback Invented the Modern Zipper
Activity by Decade
1910s1
Top Patents1 enriched
US 2799449· 1957
How Alan Turing Designed Early Computer Memory Systems
Activity by Decade
1950s1
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