Portfolio comparison
Theophilus Van Kannel vs FPDC Inc
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 387571· 1888
How the Revolving Door Was Invented
Activity by Decade
1880s1
Company B
FPDC Inc
Patents indexed
1
Year range
1985
Most recent
1985
consumer_electronicssoftwaretelecommunicationsecommercemechanical
Top Patents1 enriched
US 4528643· 1985
How Stores Make Custom Products On-Demand with Remote Approval
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.