Inventor · disambiguated record
Calvin R. Johnson
Also filed as: JOHNSON CALVIN R
4 granted patents·191 citations·filing 1975–1991
77Inventor score
Top patents by PatentIndex Score
4 records- 0190US5218038APhenolic resin coated proppants with reduced hydraulic fluid interactionBORDEN INC·Filed 1991·Granted Jun 8, 1993·172 cites·25 claims
- 0247US4054259AWaler-stiffback bracketJOHNSON CALVIN R·Filed 1976·Granted Oct 18, 1977·12 cites·21 claims
- 0329US4003546AConvertible waler braceJOHNSON CALVIN R·Filed 1975·Granted Jan 18, 1977·4 cites·8 claims
- 0425US3998424ATie rod with expandable locking coneJOHNSON CALVIN R·Filed 1975·Granted Dec 21, 1976·3 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →