KOOL Mµ by SPANG & COMPANY (Track this)
Intl: (009) Electrical and scientific apparatus US: 021 Filing date: 23-Feb-1990 Serial number: 74032079
MICRON µ by Micron Mfg. Company (Track this)
Intl: (037) Building construction and repair US: 103 Filing date: 09-Aug-1978 Serial number: 73181449