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Charles Michael Gryba
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Toronto, CA
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last 30 patents
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Patent Grant
Undercut excavation method with continuous concrete floors
Patent number
9,151,047
Issue date
Oct 6, 2015
2341451 Ontario Inc.
Charles Michael Gryba
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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last 30 patents
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Patent Application
UNDERCUT EXCAVATION METHOD WITH CONTINUOUS CONCRETE FLOORS
Publication number
20140237936
Publication date
Aug 28, 2014
2341451 ONTARIO INC.
Charles Michael Gryba
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING