Portfolio comparison
John L. Mason vs Cetus Oncology Corp
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 22186· 1858
John Mason's 1858 Patent for the Mason Jar Lid
Activity by Decade
1850s1
Top Patents1 enriched
US 5397703· 1995
Using Insect Cells to Create Antibodies for Human Diseases
Activity by Decade
1990s1
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