Patents (Tables)

12 Months Ended

Jul. 31, 2015

Accounting Policies [Abstract]

Costs and accumulated amortization of patents

 The costs and accumulated amortization of patents are summarized as follows:

	July 31,
	2015		2014
Patents	$	4,705,715	$	5,725,908
Less: Accumulated Amortization		3,275,699		3,679,547
Patents, Net	$	1,430,016	$	2,046,361
Weighted Average Life		6.6 years		7.8 years