Portfolio comparison
Docutel Corp vs DUAL PARKING METER Co
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Docutel Corp
Patents indexed
1
Year range
1973
Most recent
1973
consumer_electronicssoftwarefinancesemiconductors
Top Patents1 enriched
US 3761682· 1973
Early Automatic Cash Dispenser Using Credit Cards
Activity by Decade
1970s1
Top Patents1 enriched
US 2118318· 1938
How the First Coin-Operated Parking Meter Works
Activity by Decade
1930s1
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