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Patent #:	364521 Read More
Inventor:	Easton, Alexander Borthwick
Invention:	Loose Leaf Binding Mechanism
Location:	Calgary
Date:	02/03/37
Category:	Printing T&E; 5:Written Communication Equipment

Patent #:	661933 Read More
Inventor:	Heffring, Harland H.
Invention:	Correcting Facsimilist
Location:	Calgary
Date:	23/04/63
Category:	Printing T&E;

Patent #:	344518 Read More
Inventor:	Walker, Lionel Sylvester
Invention:	Printing Process
Location:	Calgary
Date:	11/09/34
Category:	Printing T&E;