Patents (Tables)

12 Months Ended

Oct. 31, 2021

Intangible assets and goodwill [abstract]

Disclosure of detailed information about patents [Table Text Block]

		November 1,				October 31,						October 31,
		2019		Additions		2020		Additions		Writeoffs		2021
Cost	$	681,288	$	-	$	681,288	$	-	$	-	$	681,288
Accumulated amortization		661,288		8,123		669,411		8,000		-		677,411
Net book value	$	20,000			$	11,877					$	3,877