Portfolio comparison
Zenith Radio Corp vs Amgen Inc
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Zenith Radio Corp
Patents indexed
1
Year range
1957
Most recent
1957
consumer_electronicsmechanical
Top Patents1 enriched
US 2817025· 1957
How the First Wireless Television Remote Control Works
Activity by Decade
1950s1
Top Patents1 enriched
US 5574018· 1996
Using Vitamin B12 to Help Proteins Survive the Human Digestive System
Activity by Decade
1990s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.