Jonathan D Green

US Patent:

51948370, Mar 16, 1993

Filed:

Nov 20, 1991

Appl. No.:

7/795301

Inventors:

Daniel L. Smythe - Carlisle MA
Jonathan B. Green - Belmont MA

Assignee:

Massachusetts Institute of Technology - Cambridge MA

International Classification:

H03H 1500

US Classification:

333166

Abstract:

A tapped delay line uses a varistor network for tap weighting. The varistors may be used in a resistive summing network or as amplifier gain control elements. In addition, the varistors can be programmed by a voltage programming circuit comprising a switch array, an input voltage programming bus, and sets of master and slave digital programming signals.

US Patent:

56641109, Sep 2, 1997

Filed:

Dec 8, 1994

Appl. No.:

8/351795

Inventors:

Jonathan B. Green - Belmont MA
William R. Pope - Cambridge MA

Assignee:

Highpoint Systems, Inc. - Belmont MA

International Classification:

G06F 706
G06F 1730

US Classification:

705 26

Abstract:

A remote ordering system provides a user the ability to build and edit one or more order lists, resident in memory within a user device, and the further ability to review and manipulate a user interpretable display of the contents of such lists. A system comprising merchant stock databases, a data format/transfer computer (DFTC), and display/processor units (DPUs) (the user devices) enable creation and transmission of the order lists. Coded data read into each DPU identifies items to be added to the order lists. A DPU database contains user-discernable item information stored according to the associated coded data and is capable of learning new or updating old item information when in communication with the merchant database. Item information can be automatically or manually deleted to free DPU memory.