Portfolio comparison
Thomas A. Edison vs Seoul National University R&DB Foundation
Side-by-side portfolio analysis — patents indexed, year ranges, and activity timeline.
Company A
Thomas A. Edison
Patents indexed
3
Year range
1869 – 1897
Most recent
1897
mechanicalconsumer_electronicstelecommunications
Top Patents3 enriched
US 200521· 1878
How Thomas Edison Improved Early Phonograph Recording
US 589168· 1897
How Thomas Edison's Kinetographic Camera Captured Early Motion Pictures
US 90646· 1869
Edison's First Patent: An Electric Vote Recorder
Activity by Decade
1860s1
1870s1
1890s1
Company B
Seoul National University R&DB Foundation
Patents indexed
4
Year range
2017 – 2025
Most recent
2025
semiconductorsconsumer_electronicstelecommunicationssoftwareenergy
Top Patents4 enriched
US 12266789· 2025
How to Make Lithium-Sulfur Batteries Last Longer Using Polymer Coatings
US 9685235· 2017
How to Prepare 3D Flash Memory for Use
US 9947413· 2018
How to Program 3D Layered Memory Chips More Precisely
Activity by Decade
2010s2
2020s2
How to use
Bookmark a comparison URL to save it. Format: /compare/companies?a=[slug]&b=[slug]. Also see patent-level comparison.