Portfolio comparison
Minnesota Mining and Manufacturing Co vs John Harvey Kellogg
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Minnesota Mining and Manufacturing Co
Patents indexed
2
Year range
1930 – 1979
Most recent
1979
materialsconsumer_electronics
Top Patents2 enriched
US 4166152· 1979
The Sticky Microscopic Beads Behind Post-it Notes
US 1760820· 1930
How Richard Drew Invented Modern Transparent Adhesive Tape
Activity by Decade
1930s1
1970s1
Top Patents1 enriched
US 558393· 1896
How John Harvey Kellogg Invented Flaked Breakfast Cereals
Activity by Decade
1890s1
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.