John C. Rossborough

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Amherst, NH, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for pipe-to-manhole sealing
- Patent number 4,009,545
- Issue date Mar 1, 1977
- Merchants National Bank of Manchester
- John C. Rossborough
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Method, apparatus and product for improved pipe-to-manhole sealing
- Patent number 3,958,313
- Issue date May 25, 1976
- Merchants National Bank of Manchester
- John C. Rossborough
- E03 - WATER SUPPLY SEWERAGE