Portfolio comparison
Exxon Research and Engineering Co vs Sperry Corp
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Exxon Research and Engineering Co
Patents indexed
1
Year range
1977
Most recent
1977
consumer_electronicstelecommunicationsenergymaterialsautomotive
Top Patents1 enriched
US 4009052· 1977
How Early Rechargeable Lithium Batteries Used Layered Materials
Activity by Decade
1970s1
Company B
Sperry Corp
Patents indexed
1
Year range
1985
Most recent
1985
softwaretelecommunicationsconsumer_electronicssemiconductors
Top Patents1 enriched
US 4558302· 1985
How Computers Shrink Data Using a Dynamic Dictionary
Activity by Decade
1980s1
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