Duncan Johnstone

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Lannon, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Modular industrial vacuum loading apparatus for ingesting and colle...
- Patent number 4,735,639
- Issue date Apr 5, 1988
- Vacuum America Corporation
- Duncan Johnstone
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Industrial vacuum loader with dust removal means for bag house filt...
- Patent number 4,017,281
- Issue date Apr 12, 1977
- Duncan Johnstone
- B60 - VEHICLES IN GENERAL