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Home › Inventors › Roy E. Johnson

RJ

Roy E. Johnson — 5 Patents

Norwalk, CA: #13 of 144 inventorsTop 10%

California: #107,996 of 386,348 inventorsTop 30%

Overall (All Time): #907,971 of 4,157,543Top 25%

5 Patents All Time

Roy E. Johnson has been granted 5 US patents. The first was granted in 1987 and the most recent in July 1993. Roy E. Johnson ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Roy E. Johnson in Norwalk, CA, US.

Patents per Year

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #	Title	Co-Inventors	Date
5230583	Method of sealing openings in manhole covers using a pick hole plug	—	1993-07-27
5090713	Elastomeric gasket for sealing a glass fiber reinforced cover to a vault	—	1992-02-25
5038487	Attachment for framer's square	—	1991-08-13
4934715	Gasket for use with manhole covers	—	1990-06-19
4712800	Split elastomer ring for repairing potheads and process of repairing a pothead therewith	—	1987-12-15

Roy E. Johnson — 5 Patents

Patents per Year

Issued Patents All Time

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