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PatentBrief

Portfolio comparison

MARY P JACOB vs William F. Semple

Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.

Company A

MARY P JACOB

Patents indexed

1

Year range

1914

Most recent

1914

consumer_electronics

Activity by Decade

1910s
1

Company B

William F. Semple

Patents indexed

1

Year range

1869

Most recent

1869

consumer_electronics

Activity by Decade

1860s
1

How to use

Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.