Quote:
Originally Posted by gumbo
Zitnik/Moore's Pat. # 3,479,917....1969....allows the bending of select strings and the option of vibrato on those select strings.....
.......and basically is pretty much the layout of a Bigsby Palm Pedal... 
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Similar....except for the available vibrato and single stringbending abilities combined......additionally; the hand operated pedals are similar, but that is where the similiarities end. This, as far as I'm aware, never saw the light of day...unless the patent was parked with Bigsby for them to do as they pleased and it morphed into the Palm Pedals as we know them. I thought Boomer Castleman invented the Palm Pedal though?