Portfolio comparison
Sperry Gyroscope Co Inc vs Ziehm Imaging
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
Top Patents1 enriched
US 12357189· 2025
How Medical Scanners Track Surgical Tools in Real-Time
Activity by Decade
2020s1
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