Maurice A Smith

US Patent:

D2458713, Sep 20, 1977

Filed:

Aug 6, 1976

Appl. No.:

5/712245

Inventors:

Maurice I. Smith - Woodinville WA

Assignee:

Tone Commander Systems, Inc.

International Classification:

D1403

US Classification:

D14 59

US Patent:

40864448, Apr 25, 1978

Filed:

Nov 4, 1976

Appl. No.:

5/738859

Inventors:

Maurice I. Smith - Woodinville WA
Victor M. DePinto - Bellevue WA

Assignee:

Tone Commander Systems, Inc. - Redmond WA

International Classification:

H04M 172

US Classification:

179 99

Abstract:

The system receives subscriber station address information in the form of dial pulses transmitted from a calling station along a common intercom circuit and selectively accesses a called subscriber station having a corresponding station address in order to produce a call indication ring-out thereat. The system includes a hook condition detector circuit which controls multiple system functions with respect to the on-hook and off-hook status of the calling station, and further includes a dial pulse detector circuit which effects additional control with respect to completion of dialing by the calling station. The system is suitable for use with ten or varying numbers of subscriber stations and may include, for applications having more than ten subscriber stations, appropriate transfer and associated output control circuitry for double digit operation.

US Patent:

41885112, Feb 12, 1980

Filed:

Jan 27, 1978

Appl. No.:

5/873157

Inventors:

Maurice I. Smith - Redmond WA
John D. Gillen - Kirkland WA
Gerald L. Edwards - Seattle WA

Assignee:

Tone Commander Systems, Inc. - Redmond WA

International Classification:

H04M 906

US Classification:

179 99A

Abstract:

The system includes up to four communication links, a separate link selector for each link, and a separate link scanner for each telephone station. The system is suitable for usage with conventional dial pulse or tone selective key telephone sets.

US Patent:

42582326, Mar 24, 1981

Filed:

May 25, 1979

Appl. No.:

6/042572

Inventors:

Maurice I. Smith - Carnation WA
John D. Gillen - Kirkland WA

Assignee:

Tone Commander Systems, Inc. - Redmond WA

International Classification:

H04M 322
H04M 100

US Classification:

179 99R

Abstract:

A single line hold circuit adapted for connection between the tip and ring leads of a telephone line. The circuit comprises impedance means for connection between the tip and ring leads, the impedance means including a semiconductor element having high and low impedance states, the impedance of the low impedance state being sufficiently small to maintain the telephone line in a hold condition. The circuit further comprises means for causing the semiconductor to be in its low impedance state following an interruption of a predetermined length of time in loop current. A double line hold circuit is also illustrated.

Author:

Maurice Lindsay Smith

ISBN #:

0950448907

Author:

Maurice Fullard Smith

ISBN #:

0551031840

Author:

Maurice P. Smith

ISBN #:

0398033617

Author:

Maurice Daniel Smith

ISBN #:

0205045391

Author:

Maurice Daniel Smith

ISBN #:

0205048870

Author:

Maurice Daniel Smith

ISBN #:

0205060250

Author:

Maurice Smith

ISBN #:

0404156916

Author:

Maurice Smith

ISBN #:

0748661875