Kenneth W Stevens

US Patent:

6351452, Feb 26, 2002

Filed:

Jan 19, 1999

Appl. No.:

09/233007

Inventors:

Roger L. Koenig - Boulder CO
S. Christopher Alaimo - Boulder CO
Timothy Groth - Lakewood CO
Debra M. Rose - Superior CO
Shri B. Dodani - Louisville CO
Raviraj Edwards - Aurora CO
Bharat S. Shah - Aurora CO
Kenneth M. Stevens - Boulder CO
Matthew Morris - Boulder CO

Assignee:

Carrier Access Corporation - Boulder CO

International Classification:

H04L 1228

US Classification:

370217, 370537

Abstract:

A telecommunication device for receiving and transmitting DS1 level signals that includes a 1/0 digital cross-connect switch, a GR-303 concentrator, and a frame relay aggregator switch in a single integrated device in one housing that fills less than two standard rack units. The device includes both active and standby/backup controller cards that communicate with eight quad framer cards through a bus located in the backplane. The communication through the backplane is via a 8. 192 Mbps signal to and from each quad framer card, passed along a bus. The 8. 192 Mbps signal is generated by multiplexing the four DS1 (E-1) signals on the quad framer card. The controller card that is active monitors the status of the DS1 channel associated with each framer and stores historical data about the status in spare buffer registers on each framer. Whenever a transition occurs to the standby/backup controller card, that card can obtain the historical status information from the framers to make the transition more seamless. The device also includes software that is interrupted on signaling bit changes, so that a software program can control a digital cross-connect of the signaling bits, and translation if necessary.

US Patent:

6614811, Sep 2, 2003

Filed:

Oct 5, 1999

Appl. No.:

09/412875

Inventors:

S. Christopher Alaimo - Boulder CO
Kenneth M. Stevens - Boulder CO
Mark Millican - Longmont CO
Phillip D. Clark - Boulder CO
Craig Steven Cambier - Louisville CO
Susan I. English - Boulder CO
Bharat S. Shah - Aurora CO

Assignee:

Carrier Access Corporation - Boulder CO

International Classification:

H04L 1228

US Classification:

370498, 370537

Abstract:

A modular multi-service telecommunication access device includes a controller card and card slots for six peripheral cards and a power supply. Any of several types of peripheral cards can be inserted into the six card slots. A card present/protocol scheme allows an inserted card to recognize its address and communicate same as well as its communication protocol to the controller card via a PCM highway. The controller card sends both signaling information and management information to the peripheral cards via another PCM highway. A unique communication protocol allows for both real time signaling information and non-real time management information to be sent on the same channel. A microprocessor on the controller card includes an algorithm for managing messages to the various peripheral cards in the various card slots. A unique tributary addressing scheme allows for a simplified address used by external users to be converted to a more detailed internal address. A battery sense circuit includes a variable resistive element used in conjunction with additional circuitry to sense conditions relevant to the battery.

US Patent:

49224085, May 1, 1990

Filed:

May 12, 1988

Appl. No.:

7/195465

Inventors:

Alan L. Davis - Half Moon Bay CA
Shane V. Robison - Half Moon Bay CA
Kenneth S. Stevens - Union City CA

Assignee:

Schlumberger Technology Corporation - San Jose CA

International Classification:

G06F 1516

US Classification:

364200

Abstract:

A communication network formed by a plurality of communication processors which are connected together in hexagonal array is disclosed. The data processing system consists of a plurality of data processors. Each data processor is coupled to a communication processor which is responsible for sending messages to and receiving messages from other communication processors. Each communication processor communicates with the 6 communication processors adjacent to it through 6 ports. When a given data processor wishes to send a message to another data processor, it transfers the message to its communication processor which in turn transfers the message to the communication processor coupled to one of these 6 ports with information specifying the final destination of the message. The message routing algorithm used by each of communication processors automatically reroutes messages around communication bottlenecks created by a malfunctioning communication processor or by a local communication overload.

US Patent:

39549917, May 4, 1976

Filed:

Feb 27, 1975

Appl. No.:

5/554053

Inventors:

Kenneth L. Stevens - Walnut Creek CA
Leonard Jurd - Berkeley CA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

A01N 928

US Classification:

424282

Abstract:

Limonene (or alpha-pinene) is condensed with sesamol under aqueous acidic conditions to produce a mixture of two novel compounds which are useful as mosquito larvicides.

US Patent:

39728978, Aug 3, 1976

Filed:

Oct 30, 1975

Appl. No.:

5/627328

Inventors:

Kenneth L. Stevens - Walnut Creek CA
Leonard Jurd - Berkeley CA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

C07D31748

US Classification:

2603405

Abstract:

Limonene (or alpha-pinene) is condensed with sesamol under aqueous acidic conditions to produce a mixture of two novel compounds which are useful as mosquito larvicides.