My thinking was: "From learning from 1st zw_report..." ...that your brother met the inventors: Inventors: - Hennenhoefer; Earl (Harrisburg, PA) - Snyder; Richard V. (Harrisburg, PA), - Stine; Robert D. (Dillsburg, PA) >>>>> BTW and once again, thank you gentlemen. :-) That possibly, they exchanged emails. That zw may be able to obtain the layman's difference among the 3 patents directly from the source(s). That was my hope anyway. Else zw may obtain the differences from his "Revelations". Unfortunately, those haven't come my way lately.