Portfolio comparison
Sperry Gyroscope Co Inc vs Zeta Global Corp
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 1242065· 1917
How Elmer Sperry Invented the Gyroscopic Compass for Ships
Activity by Decade
1910s1
Company B
Zeta Global Corp
Patents indexed
1
Year range
2019
Most recent
2019
consumer_electronicssoftwareecommerce
Top Patents1 enriched
US 10204358· 2019
How Referral-Based Text Message Marketing Systems Work
Activity by Decade
2010s1
How to use
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