Machine readable merchandise marking tag
Machinery shaft alignment calculator
Magnetic card substitute for coins for starting appliances and t
Magnetic card writing and reading device
Magnetic data reader employing magnetically operated solid state
Magnetic identification apparatus
Magnetic reader for bar encoded characters
Magnetic-type information card and method and apparatus for enco
Manual calculator for analog and digital numbers
Manually operable card reader
Mariner's dogleg course distance calculator
Mark reader with improved mark sensing heads
Marking document and template assembly and method of making the
Mathematics teaching system
Measuring device
Mechanical astrological calculating device
Mechanical binary number adding and subtracting apparatus
Mechanical computer assembly
Mechanical device for determining the modulus and loss factor of
Mechanical fuel pump computer conversion mechanism