Portfolio comparison
Digimarc Corp vs Theophilus Van Kannel
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Digimarc Corp
Patents indexed
1
Year range
2003
Most recent
2003
softwareconsumer_electronicsai_ml
Top Patents1 enriched
US 6567533· 2003
How Digital Images Hide Invisible Markers to Track Rotation and Scaling
Activity by Decade
2000s1
Top Patents1 enriched
US 387571· 1888
How the Revolving Door Was Invented
Activity by Decade
1880s1
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