Self-enforcing parking system

Serration detector

Serration detector

Simplified multi-price vend control circuit

Single coin carriage bar

Slide actuator and means controlling movement of same between fu

Slot machine coin guide

Slug rejector

Slug rejector

Solid state slug rejector

Solid state, coin activated mechanism

Stamp book vending machine

Stamp vending machine

Storage and retrieval control apparatus and method

Storage of hand-propelled vehicles

String detector for a coin-selecting device

Supplemental coin acceptor/rejector mechanism for coin operated

System and method for determining vendibility in automatic vendi

System for controlling coin-operated lockers

Tamperproof coin box closure