Andrew E. Johnston — 4 Patents at Rotomaster

Andrew E. Johnston has been granted 4 US patents while listed as an inventor at Rotomaster. The first was granted in 1984 and the most recent in March 1989. Andrew E. Johnston ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Andrew E. Johnston in San Fernando, CA, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
4815184	Method of fabricating a turbocharger water-cooled bearing housing	Jon A. Meyer, Ronald Miller	1989-03-28
4704075	Turbocharger water-cooled bearing housing	Jon A. Meyer, Ronald Miller	1987-11-03
4504187	Turbocharger method of operation and turbine housing therefor	Hugh MacInnes, Jon A. Meyer, John Fort	1985-03-12
4474484	Semi-floating bearing	Hugh MacInnes	1984-10-02

Andrew E. Johnston — 4 Patents

Issued Patents All Time

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