7. Patents

		As at November 1,							As at October 31,
		2022		Additions			Disposals		2023
Cost	$	681,288	$	-		$	-	$	681,288
Accumulated amortization		681,288		-			-		681,288
Net book value	$	-	$	-		$	-	$	-

		As at November 1,							As at October 31,
		2021		Additions			Disposals		2022
Cost	$	681,288	$	-		$	-	$	681,288
Accumulated amortization		677,411		3,877			-		681,288
Net book value	$	3,877	$	(3,877	)	$	-	$	-

The Company holds several patents in the United States for its Multimodal Fluid Condition Sensor Platform. The patents are fully amortized as at October 31, 2023 and 2022.