Portfolio comparison
William F. Semple vs Centocor 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 7070775· 2006
How Engineered Antibodies Block Inflammation-Causing Proteins
Activity by Decade
2000s1
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