Portfolio comparison
Sperry Corp vs Almon B. Strowger
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Sperry Corp
Patents indexed
1
Year range
1985
Most recent
1985
softwaretelecommunicationsconsumer_electronics
Top Patents1 enriched
US 4558302· 1985
How Computers Compress Data Using Dictionary Building
Activity by Decade
1980s1
Top Patents1 enriched
US 447918· 1891
How Almon Strowger Invented the Automatic Telephone Switch
Activity by Decade
1890s1
How to use
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