Patents

12 Months Ended

Oct. 31, 2018

Statements Line Items

Patents [Text Block]

9.        Patents

		November 1,
		2016		Additions		October 31, 2017		Additions		October 31, 2018
Cost	$	621,181	$	161,647	$	782,828	$	121,603	$	904,431
Accumulated amortization		217,581		133,785		351,366		156,960		508,326
Net book value	$	403,600			$	431,462			$	396,105

Of the total amortization expense, $nil was capitalized to development costs in the year ended October 31, 2018 (2017 - $nil); (2016 - $71,988).