Don T Walker

US Patent:

7543190, Jun 2, 2009

Filed:

Jun 28, 2006

Appl. No.:

11/426960

Inventors:

Don H. Walker - Katy TX, US

International Classification:

G06F 11/00

US Classification:

714 43, 714 44

Abstract:

False positive error warnings associated with hot insertion or removal of a device with an SAS link are filtered by comparing the timing of error warnings with the timing of hot insertion or removal of the device. An SCSI Enclosure Processor monitors physical device presence events through a side band bus, such as an I2C bus interfaced with physical devices. Upon detection of an error associated with the SAS link, an error filter module retrieves time stamped physical device presence events from the SCSI Enclosure Processor, compares the time stamp of the physical device presence event and suppresses the warning if the time stamp falls within a predetermined time of the error.

US Patent:

48114898, Mar 14, 1989

Filed:

Sep 28, 1987

Appl. No.:

7/101402

Inventors:

Don W. Walker - Arcadia TX

International Classification:

G01B 310

US Classification:

33759

Abstract:

A pipe fitter's tape measuring strip of 25-foot length is marked on one surface with cumulative inch markings along one edge, with information providing take-off charts along the other edge at a leading end of the strip and with cumulative foot and inch markings following the charts along the remainder of the strip length. The opposite surface of the strip is marked with charts providing information on flange sizes related to different pipe sizes. The length indicating indicia includes graduation lines with each 1/16, 1/8 and 1/4 inch graduation line having a black dot at the inner end, each one inch graduation line having a larger black dot at the inner end thereof and each 1/2 inch graduation line having a horizontal, short black slash line at the inner end thereof to render the tape measure easier to read.

US Patent:

46961100, Sep 29, 1987

Filed:

Jun 6, 1986

Appl. No.:

6/871889

Inventors:

Don W. Walker - Santa Fe TX
Lynn Rush - Santa Fe TX

International Classification:

G01B 310

US Classification:

33137R

Abstract:

A pipe fitter's tape measuring strip of 25 foot length is marked on one surface thereof with cumulative inch markings along one edge, with information providing take-off charts along the other edge at a leading end of the strip and with cumulative foot and inch markings following the charts along the remainder of the strip length. The opposite surface of the strip is marked with charts providing information of flange sizes related to different pipe sizes.