Inventor · disambiguated record
Birger Ludvigson
Also filed as: LUDVIGSON BIRGER
3 granted patents·36 citations·filing 1976–1979
68Inventor score
Files withLUDVIGSON BIRGER3
Top patents by PatentIndex Score
3 records- 0172US4102408APile driving deviceLUDVIGSON BIRGER·Filed 1977·Granted Jul 25, 1978·30 cites·13 claims
- 0228US4048706AMethod of eliminating and uneven stress distribution in an elongated reinforced memberLUDVIGSON BIRGER·Filed 1976·Granted Sep 20, 1977·3 cites·13 claims
- 0325US4376527ADevice for tensioning a reinforcing strandLUDVIGSON BIRGER·Filed 1979·Granted Mar 15, 1983·3 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →