A variety of devices could be powered selectively from a single-power source carried on the body via multiple power supply signals at different frequencies, according to the patent abstract.
According to the patent abstract, there were multiple power supply handwritten signatures at different frequencies.
Obviously doesn't make sense as it should be power supply signals, not power supply handwritten signatures. I guess signatures is close enough to signals to confuse the system.
( z1 say :ARG0 ( z2 abstract :mod ( z3 patent ) ) :ARG1 ( z4 signature :ARG1-of ( z5 write :instrument ( z6 hand ) ) :quant ( z7 multiple ) :ARG0-of ( z8 supply :ARG1 ( z9 power ) ) :frequency ( z10 frequency :ARG1-of ( z11 differ ) ) ) )