Donald P Schaefer

US Patent:

6640253, Oct 28, 2003

Filed:

Jun 27, 2001

Appl. No.:

09/892394

Inventors:

Donald E. Schaefer - Wantagh NY

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

G06F 1516

US Classification:

709248, 370328, 370329, 370338

Abstract:

A logical function is executed in addressable units in a wireless local area network based upon the current state value of other units in the network. Depending upon a persistence setting which may be pre-set or programmed into each unit, the logical function may be recomputed at predetermined time intervals, or upon receiving an overriding resetting signal or control packet.

US Patent:

6675203, Jan 6, 2004

Filed:

Oct 10, 2000

Appl. No.:

09/686755

Inventors:

Alan Herrod - Farmingville NY
James Fuccello - Patchogue NY
Donald E. Schaefer - Wantagh NY

Assignee:

Symbol Technologies, Inc. - Holtsville NY

International Classification:

G06F 1516

US Classification:

709217, 705 28, 23546245

Abstract:

The method provides for a way to ensure that the application program running on the host computer handles data received from the at least one mobile computer terminals when one of the mobile computer terminals goes out of range of the wireless network. Communication and association may be established between a mobile computer terminal and an access point on a local network. Then, when it has been determined that communications between the mobile computer terminal and the access point have been impeded, the mobile computer terminal may switch to batch mode to continue data collection.

US Patent:

20050239518, Oct 27, 2005

Filed:

Apr 21, 2004

Appl. No.:

10/828787

Inventors:

Anthony D'Agostino - Smithtown NY, US
Charles Bolen - Kings Park NY, US
Donald Schaefer - Wantagh NY, US

International Classification:

H04B001/38
H04M001/00

US Classification:

455574000, 455572000

Abstract:

The present invention manages power for state machines. The system and methods selectively apply, remove and/or reduce power to portions of the state machine, based on power management schemes, intelligence, a user, an application, etc. Such novel systems and methods provide for sustaining a CPU and/or a network radio in an “on” state, while lowering and/or removing power to other portions of the state machine to reduce power consumption. The foregoing enables a wireless mobile terminal to maintain network connectivity and be able to wake to service events such as a link status change, a network keep alive, a proxy-ARP packets, a re-authentication packets, etc. Such power management can execute in the background and return the wireless mobile terminal to a “run” state via invocation from a wake source such as a power control, a key, a trigger, a touch screen, a wake up timer, a wake-on-LAN, etc.

US Patent:

20090037756, Feb 5, 2009

Filed:

Jul 31, 2007

Appl. No.:

11/831007

Inventors:

David T. Lundquist - Stony Brook NY, US
Donald E. Schaefer - Wantagh NY, US

International Classification:

G06F 1/32

US Classification:

713323

Abstract:

Described is a method for suspending operation of a mobile unit. Data, settings, an operating system state, and/or at least one application state of a mobile unit is saved to a non-volatile memory. At least one component of the mobile device is deactivated. The mobile unit is placed in a suspend mode.