Portfolio comparison
James Ritty vs Automatic Electric Co
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 271363· 1883
How James Ritty's First Cash Register Tracked Sales
Activity by Decade
1880s1
Company B
Automatic Electric Co
Patents indexed
1
Year range
1925
Most recent
1925
telecommunicationsmechanical
Top Patents1 enriched
US 1537326· 1925
How Early Telephone Systems Managed Busy Lines Automatically
Activity by Decade
1920s1
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