Portfolio comparison
Sperry Gyroscope Co Inc vs Process Systems Inc
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
Process Systems Inc
Patents indexed
1
Year range
1987
Most recent
1987
telecommunicationsmechanicalsemiconductors
Top Patents1 enriched
US 4677614· 1987
How Self-Healing Data Loops Automatically Elect a New Master Controller
Activity by Decade
1980s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.