Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Statement of Cash Flows [Abstract]
Net income	$ 50,965	$ 79,213
Depreciation and amortization	6,826	5,836
Changes in assets and liabilities
Accounts receivable	38,564	18,132
Inventories	3,987	(11,443)
Prepaid expenses	15,560	2,828
Accounts payable and accrued expenses	(32,040)	(9,171)
Total Adjustments	32,897	6,182
Net cash provided by operating activities	83,862	85,395
Cash flow from investing activities
Purchase of equipment	(3,525)	(8,848)
Patents and patents pending	(28,799)	(34,873)
Net cash used in investing activities	(32,324)	(43,721)
Increase in cash and cash equivalents	51,538	41,674
Cash Beginning Period	796,023	786,574
Cash Ending Period	847,561	828,248
Supplemental Cash Flow Information
Income taxes paid	29,076	40,300
Interest paid	$ 0	$ 0