US PATENT SUBCLASS 505 / 908
.~.~.~ Method of operation

Current as of: June, 1999
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505 /   HD   SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS

825  DF  APPARATUS, PER SE, DEVICE, PER SE, OR PROCESS OF MAKING OR OPERATING SAME {36}
902  DF  .~ Railway (e.g., rapid transit, etc.): (Class 104) {1}
903  DF  .~.~ Suspension (e.g., magnetic, electrodynamic, etc.) {5}
908.~.~.~ Method of operation

DEFINITION

Classification: 505/908

Method of operation:

(under subclass 903) Subject matter including a process of directing, causing, or allowing a railway system or an essential part thereof to function.