Portfolio comparison
Amgen Inc vs Merck and Co Inc
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 5574018· 1996
Using Vitamin B12 to Help Proteins Survive the Human Digestive System
Activity by Decade
1990s1
Top Patents1 enriched
US 4231938· 1980
The Discovery of Lovastatin for Lowering Cholesterol
Activity by Decade
1980s1
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