Portfolio comparison
William F. Semple vs Abgenix Inc
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 98304· 1869
William Semple's 1869 Patent for Improved Chewing Gum
Activity by Decade
1860s1
Top Patents1 enriched
US 6682736· 2004
How Human Antibodies Block the Immune System's Off-Switch
Activity by Decade
2000s1
How to use
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