1
Jon Eric Berge, Glenn Scott Seamark: Pneumatic apparatus and method for conveyance of frozen food items. D&B Supply, Brown Martin Haller & McClain, August 26, 1997: US05660506 (24 worldwide citation)

Pneumatic conveying apparatus and method are described to provide for a simple, economical, convenient (and preferably automatic) system for conveying small pieces of frozen food (e.g., chopped vegetables, diced meat, or preferably ice cubes or crushed ice) on an as-required basis to one or more loc ...


2
Charles F Davis, Joseph V Bednar: Pulsed width modulated remote signalling and location identification system for summoning a service industry worker. D & B Supply, Rick R Wascher, July 20, 1999: US05926111 (10 worldwide citation)

A system for summoning a service industry worker using pulsed width modulation for remote signalling having a number of signalling switches, each connected to a transmitter. When a switch is activated, the corresponding transmitter transmits an RF carrier modulated by a lower frequency tone, turning ...