Portfolio comparison
Owens Illinois Glass Co vs John L. Mason
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 2133235· 1938
How Glass Fibers Are Spun for Insulation
Activity by Decade
1930s1
Top Patents1 enriched
US 22186· 1858
John Mason's 1858 Patent for the Mason Jar Lid
Activity by Decade
1850s1
How to use
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