David N Daniel

US Patent:

6355532, Mar 12, 2002

Filed:

Oct 6, 1999

Appl. No.:

09/413667

Inventors:

John J. Seliskar - Northglenn CO
Verne Hornback - Troutdale OR
David Daniel - Vancouver WA

Assignee:

LSI Logic Corporation - Milpitas CA

International Classification:

H01L 21336

US Classification:

438283, 438213, 438589, 438157

Abstract:

A short vertical channel, dual-gate, CMOS FET is fabricated by forming a plurality of channel segments in a starting material that extend longitudinally between source and drain areas. The channel segments are laterally separated from one another by spaces and are preferably formed from pillars of starting material located between the spaces. The pillars are laterally oxidized and the oxidation is removed to reduce the width of the pillars and form the channel segments. A gate structure is formed in the spaces between the channel segments. The width of each pillar is defined by conventional, contemporaneous photolithographic exposure and etching, but the width of each channel segment is substantially less than the width of the etch resistant barrier created photolithographically. The relatively narrow channel widths allow fully-depleted and fully-inverted conductivity characteristics which enhance the conductivity characteristics of the FET despite its reduced size, without silicon on insulator (SOI) constructions or epitaxial substrates.

US Patent:

6366422, Apr 2, 2002

Filed:

Apr 1, 1999

Appl. No.:

09/283170

Inventors:

David B. Daniel - Longmont CO
Fred Eifert - Eaton CO
Douglas Christian Hansen - Boulder CO
David Lawson - Arvada CO
Thai Nguyen - Thornton CO

Assignee:

Storage Technology Corporation - Louisville CO

International Classification:

G11B 500

US Classification:

360 76

Abstract:

It is difficult to read data from curved helical data tracks in a helical scan tape drive. Curved helical tracks can be caused by improper tape tension, tape damage, tape path misalignment, tape head offset between different head systems, and debris. The present invention solves the problem of recovering data from curved helical tracks by providing a table of different curve offset signals. Each curve offset signal represents a curve track profile of a typical curved track. The position of the helical read head reading a curved data track is controlled as a function of one of the curve offset signals such that the read head is positioned properly with respect to the helical data track to provide a proper read back signal. The curve offset signals are selected one at a time to control the position of the helical read head until the helical read head provides a proper read back signal.

US Patent:

6419147, Jul 16, 2002

Filed:

Aug 23, 2000

Appl. No.:

09/644807

Inventors:

David L. Daniel - Houston TX 77098

International Classification:

B23K 2000

US Classification:

228194, 228135, 228193, 428544

Abstract:

A combination mechanical and metallurgical connection is provided for joining members such as conduits wherein amorphous diffusion bonding material is placed at mating or abutting surfaces in the mechanical joint, the bonding material is compressed under pressure and heat is applied to cause the bonding material to diffuse into the mechanical connection.

US Patent:

6565029, May 20, 2003

Filed:

Jun 20, 2001

Appl. No.:

09/885660

Inventors:

James Zweighaft - Boulder CO
David B. Daniel - Longmont CO

Assignee:

Quantum Corp. - Milpitas CA

International Classification:

G11B 1546

US Classification:

2423344, 2425342, 2425632, 360 71

Abstract:

A method for detecting slippage in a tape path, and re-calibrating a sensing assembly in a tape storage device to account for the slippage. The method includes sensing a position of one of a supply reel and a take-up reel. In response to sensing the position of the supply reel or take-up reel, sensing a position of a guide roller. The position of the guide roller corresponds to the position of the guide roller when the position of the supply reel or the take-up reel is sensed. In response to sensing the position of the guide roller, the tape media is wound through the tape path between the supply reel and the take-up reel. In response to winding the tape media through the tape path, a second position of the one of the supply reel and the take-up reel is sensed. In response to sensing the second position of the one of the supply reel and the take-up reel, a second position of the guide roller is sensed. The second position of the guide roller corresponds to the position of the guide roller when the second position of the one of the supply reel or the take-up reel is sensed.

US Patent:

6568618, May 27, 2003

Filed:

May 23, 2000

Appl. No.:

09/575977

Inventors:

William J. Vanderheyden - Loveland CO
Kevin S. Fletcher - Boulder CO
Michael J. OKeeffe - Boulder CO
David B. Daniel - Longmont CO

Assignee:

Quantum Corporation - Milpitas CA

International Classification:

G11B 1566

US Classification:

2423327, 2423328, 360 93

Abstract:

The half-inch tape drive comprises a novel takeup reel, tape deck, PC board packaging, loading mechanism, and housing. The takeup reel comprises a pair of segmented flanges that define a first and second tape containment section. The tape deck is approximately half the height of a conventional tape deck and includes reinforcing ribs to provide structural rigidity and maintain alignment of the moving components of the tape drive during operation. The loading mechanism comprises a horizontally mounted load motor that employs a worm gear to engage a simplified gear train. The printed circuit board is segmented into multiple sections that are mounted in various locations on the tape drive to maximize spatial efficiencies and reduce the overall height of the tape drive. The tape drive housing provides a protective exterior for the tape drive components and provides the structure for mounting the present tape drive in a single drive bay of a computer housing.

US Patent:

20120118426, May 17, 2012

Filed:

Oct 12, 2011

Appl. No.:

13/271972

Inventors:

DAVID L. DANIEL - HOUSTON TX, US
WILLIAM D. VAN ARNAM, III - HUFFMAN TX, US
DANNY J DENNIS - HUFFMAN TX, US
KEVIN J. ELLIOTT - HOUSTON TX, US
CLAYTON D. HARGIS - HOUSTON TX, US

Assignee:

QUALITY TUBING, INC. - HOUSTON TX

International Classification:

F16L 9/00
B23K 31/02

US Classification:

138177, 228144

Abstract:

New methods of manufacturing coiled tubing result in increased useful life of the coiled tubing string by creating an enhanced strip-to-strip weld zone having load bearing and/or fatigue resistance properties substantially equal to or greater than the load bearing and/or fatigue resistance properties of the strip base material. The enhanced weld zone is transition into the nominal tubing to reduce stress concentration.

US Patent:

20130092279, Apr 18, 2013

Filed:

Oct 12, 2011

Appl. No.:

13/380163

Inventors:

David L. Daniel - Houston TX, US
William D. Van Arnam, III - Huffman TX, US
Danny J. Dennis - Huffman TX, US
Kevin J. Elliot - Houston TX, US
Clayton D. Hargis - Houston TX, US

Assignee:

QUALITY TUBING, INC. - Houston TX

International Classification:

B23K 31/02
F16L 9/02

US Classification:

138157, 228155

Abstract:

New methods of manufacturing coiled tubing result in increased useful life of the coiled tubing string by creating an enhanced strip-to-strip weld zone having load bearing and/or fatigue resistance properties substantially equal to or greater than the load bearing and/or fatigue resistance properties of the strip base material. The enhanced weld zone is transition into the nominal tubing to reduce stress concentration.

US Patent:

20200318452, Oct 8, 2020

Filed:

Mar 30, 2020

Appl. No.:

16/833896

Inventors:

- Ventura CA, US
David Charles DANIEL - Missouri City TX, US

International Classification:

E21B 33/038
E21B 17/18
E21B 43/12

Abstract:

A wellhead adaptor for fluidly connecting to a well tubing system, the wellhead adaptor including an outer body having a bore; and an inner body located inside the bore and having an annulus A. The inner body and the outer body define an annulus B, which is concentric to annulus A.