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Portable work station and data collection terminal including switchable multi purpose touch screen display

  • US 5,850,358 A
  • Filed: 04/01/1997
  • Issued: 12/15/1998
  • Est. Priority Date: 05/03/1989
  • Status: Expired due to Term
First Claim
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1. A portable data collection terminal comprising:

  • a housing having a frontal side including a display screen and a keyboard wherein the display screen includes a screen area and a graphic data input mechanism disposed coincident with the screen area; and

    a power management circuit mechanism including a non-volatile memory and a shadowing circuit configured to operably provide(a) shadowing of input and output device states of the terminal, and(b) storing microprocessor register states, including input and output device states, to the non-volatile memory as the terminal is being shut down.

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