Portfolio comparison
Amgen Inc vs ChaCha Search 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 8577894· 2013
How Human Searchers Unlock Restricted Web Content for Users
Activity by Decade
2010s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.