SMARTLOCK
EQUIPMENT FOR PREVENTING UNSAFE ACTIONS, NAMELY, ONE TRAIN CATCHING UP TO ANOTHER ON THE SAME LINE, ANTI-COLLISION AND HEAD ON APPROACH OF TWO TRAINS ON THE SAME BRANCH LINE IN THE NATURE OF ELECTRONIC SPEED CONTROLLERS, ELECTRONIC DEVICES, NAMELY, COMPUTERS, SOFTWARE, PRINTED CIRCUITS, CALCULATORS, ELECTRONIC CARDS; RELAYS, TRAIN OPERATING UNITS
Cancelled · September 22, 1999 · 75805739 ·