cheers, krump
"TRAIN up a child in the way he should go, and when he is old he will not depart from it" ... Proverbs 22:6
Dave H. Painted side goes up. My website : wnbranch.com
"I like my Pullman Standards & Budds in Stainless Steel flavors, thank you!"
QUOTE: Originally posted by sptrainman As I understand it, Lionel stole drawings of the loco designs themselves. If so, they deserve what they got. I don't think it had anything to do with the control system. The real crime in my opinion is that the US patent office approved these MTH patents. As an engineer, I believe that the technology of speed control and digital sound that these patents protect is obvious and therefore not patentable. This is why I don't thinkg any other inventor has bothered to patent their designs. Unfortunately, now that these patents have been granted, all of the other companies are going to have to either prove that they MTH was not the first to invent the technology or show that the ideas are obvious to anyone skilled in the art. I just don't think patent examiner did his due dilligence to review and understand prior art. Digital speed control of electric motors is a well known technic and its application to model trains, cars, etc. is a natural, obvious progression.
QUOTE: Originally posted by Student of Big Sky Blue Didn't the first forms of what we now call Command Control comeout in the late 70s? Dynatrol and Astrac I believe? Any of you old timers know?