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Patent #:	539013 Read More
Inventor:	Coombs, Vincent B. (assignor)
Invention:	Dip and Slope Estimating Device
Location:	Calgary
Date:	02/04/57
Category:	Surveying and Navigational T&E;

Patent #:	539013 Read More
Inventor:	Geophoto Services (assignee)
Invention:	Dip and Slope Estimating Device
Location:	Denver, CO
Date:	02/04/57
Category:	Surveying and Navigational T&E;

Patent #:	559169 Read More
Inventor:	Noel, Paul F.
Invention:	Flashlight and Hand Level Holder
Location:	Spirit River
Date:	24/06/58
Category:	Surveying and Navigational T&E;

Patent #:	467496 Read More
Inventor:	Watmough, Oliver
Invention:	Distance Markers for Field Use
Location:	Lethbridge
Date:	22/08/50
Category:	Surveying and Navigational T&E;