Portfolio comparison
Biosphere Aerospace LLC vs George B. Selden
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Top Patents1 enriched
US 9073647· 2015
A Modular Launch System with an Expandable Mast for Spacecraft
Activity by Decade
2010s1
Top Patents1 enriched
US 549160· 1895
George Selden's 1895 Patent for a Road Engine
Activity by Decade
1890s1
How to use
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