United States Patent and Trademark Office
Feb 9, 2007 ... 1973: invented and patented the first "pulsating" stream water guns in; 1984: ... the Quick Fill System harnessing the water and house pressure from the garden ... N' Shoot and (1996) Robo Blaster water shooters for Cap Toys of Ohio. ... "Z pattern" water - bubbles - paint and food stream patterns as well.
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United States Patent and Trademark Office's website is isoaker.com