Three line scanner for bar code symbols
Three variable reference chart and calculator
Ticket reader
Ticket reader and imprinter with bypass switch
Tidal depth calculator
Tide and time calculating device
Tide and time calculating device
Tide calculator
Time card computer
Time period calculator
Time-tape calculator
Time/speed/distance slide rule
Token-control
Transaction execution system with secure data storage and commun
Trigonometric slide rule
Two frequency coded data interpreting method and apparatus
Two-piece slide calculator for determining metabolic requirement
Universal funds transfer and identification card
Universal self-clocking code reading method and apparatus
UPC encodation verifier