IP Library › Assignment 005169/0319
Patent Assignment
Reel/Frame 005169/0319

Change of Name Effective October 11, 1988 (Delaware)

Recorded: 1988-11-02 Pages: 3
Assignor
Assignee
Covered Properties (67)
Boronized Drill Bit Cutters
Patent: 3,842,921 →
Application: 05/387,565 →
Wear Resistant Boronized Surfaces and Boronizing
Patent: 3,922,038 →
Application: 05/387,566 →
Exhaust Means for Percussion Tool Motors
Patent: 3,986,565 →
Application: 05/536,529 →
Tooth Loading for Earth Boring Bits
Patent: 3,970,158 →
Application: 05/572,545 →
Lubricant Pressure Compensator for an Earth Boring Drill Bit
Patent: 4,055,225 →
Application: 05/687,131 →
Biased Lubricant Compensator for an Earth Boring Drill Bit
Patent: 4,276,946 →
Application: 05/885,723 →
Drill Pipe Identification Method and System
Patent: 4,202,490 →
Application: 05/918,640 →
Earth Boring Drill Bit with Snap Ring Cutter Retention
Patent: 4,236,764 →
Application: 06/006,706 →
Clad Mud Nozzle
Patent: 4,301,877 →
Application: 06/128,695 →
Plunger Lubricant Compensator for an Earth Boring Drill Bit
Patent: 4,386,667 →
Application: 06/145,549 →
Gage Row Structure of an Earth Boring Drill Bit
Patent: 4,343,372 →
Application: 06/161,701 →
Earth Boring Drill Bit with Snap Ring Cutter Retention
Patent: 4,344,658 →
Application: 06/174,483 →
Sealed and Lubricated Rock Bit with Air Protected Seal Ring
Patent: 4,375,242 →
Application: 06/177,292 →
Earth Boring Bit with Extended Gage
Patent: 4,359,113 →
Application: 06/184,708 →
Sealed Lubricated and Air Cooled Rock Bit Bearing
Patent: 4,386,668 →
Application: 06/188,443 →
Stressed Relieved Bit Leg for an Earth Boring Bit
Patent: 4,431,066 →
Application: 06/235,481 →
Cooled Journal Bearing
Patent: 4,386,663 →
Application: 06/238,258 →
Insert with Locking Projection
Patent: 4,406,337 →
Application: 06/249,583 →
Nozzle Retaining Ring with Crushed O-Ring
Patent: 4,400,024 →
Application: 06/288,712 →
Drill String Shock Absorber with Pressurized Lubricant System
Patent: 4,402,495 →
Application: 06/311,500 →
Earth Boring Drill Bit with Snap Ring Cutter Retention
Patent: 4,491,428 →
Application: 06/325,608 →
Triad for Rock Bit Assembly
Patent: 4,414,734 →
Application: 06/326,083 →
Telemetry Drill Pipe with Pressure Sensitive Contacts
Patent: 4,445,734 →
Application: 06/327,524 →
Spaced Button Thrust Surface for Earth Boring Bit
Patent: 4,451,162 →
Application: 06/389,782 →
Clamping Assembly
Patent: 4,507,843 →
Application: 06/448,671 →
Floating Seal for Earth Boring Bit
Patent: 4,428,687 →
Application: 06/497,217 →
Earth Boring Bit with Pressure Compensating Rigid Face Seal
Patent: 4,516,641 →
Application: 06/542,801 →
Air Groove Scraper
Patent: 4,515,228 →
Application: 06/555,735 →
Earth Boring Bit with Pressure Compensating Bearing Seal
Patent: 4,519,719 →
Application: 06/559,651 →
Dynamic Downhole Recorder
Patent: 4,661,932 →
Application: 06/561,487 →
Solid Head Bit with Tungsten Carbide Central Core
Patent: 4,574,895 →
Application: 06/566,962 →
Opposed Button Thrust Surfaces for Earth Boring Bits
Patent: 4,549,820 →
Application: 06/578,318 →
Diamond Drill Bit with Varied Cutting Elements
Patent: 4,602,691 →
Application: 06/618,113 →
Method for Shanking Rock Bits
Patent: 4,559,852 →
Application: 06/625,479 →
Diagnostic Apparatus
Patent: 4,644,479 →
Application: 06/636,195 →
Replaceable Bit Nozzle
Patent: 4,603,750 →
Application: 06/656,825 →
Earth Boring Bit with Bearing Sleeve
Patent: 4,600,064 →
Application: 06/705,158 →
Downhole Pressure Fluctuating Tool
Patent: 4,630,689 →
Application: 06/708,207 →
Welding Torch with Dual Gas Shielding
Patent: 4,567,343 →
Application: 06/710,000 →
Earth Boring Bit with Improved Rigid Face Seal Assembly
Patent: 4,666,001 →
Application: 06/733,435 →
Simultaneous Carburizing and Boronizing of Earth Boring Drill Bits
Patent: 4,655,851 →
Application: 06/743,449 →
Pre-Set Torque Limiter Sub
Patent: 4,655,479 →
Application: 06/787,580 →
Method for Protecting from Hardening a Selected Region of a Steel Structure
Patent: 4,664,722 →
Application: 06/790,922 →
Earth Boring Bit with Labyrinth Seal Protector
Patent: 4,613,004 →
Application: 06/795,574 →
Pack Carburizing Process for Earth Boring Drill Bits
Patent: 4,643,051 →
Application: 06/806,253 →
Earth Boring Bit with Shear Compression Seal
Patent: 4,671,368 →
Application: 06/814,343 →
Matrix Bit with Extended Blades
Patent: 4,667,756 →
Application: 06/867,343 →
Drilling Bit with Full Release Void Areas
Patent: 4,696,354 →
Application: 06/880,214 →
Method of Hardfacing Steel Bodied Bits
Patent: 4,685,359 →
Application: 06/893,112 →
Compensator for Earth Boring Bits
Patent: 4,727,942 →
Application: 06/927,789 →
Drill Bit with Covered Ring Nozzle Retainer
Patent: 4,793,426 →
Application: 06/935,428 →
Surface Acoustic Wave Pipe Identification System
Patent: 4,698,631 →
Application: 06/943,338 →
Well Bore Data Transmission System
Patent: 4,788,544 →
Application: 07/001,286 →
Earth Boring Bit with Two Piece Bearing and Rigid Face Seal Assembly
Patent: 4,753,303 →
Application: 07/023,170 →
Volume and Pressure Balanced Rigid Face Seal for Rock Bits
Patent: 4,753,304 →
Application: 07/023,178 →
Method for Manufacturing a Rotary Rock Bit
Patent: 4,741,471 →
Application: 07/040,381 →
Diamond Drill Bit with Co-Joined Cutters
Patent: 4,714,120 →
Application: 07/042,546 →
Earth Boring Bit Having a Replaceable, Threaded Nozzle with Wrench Socket
Patent: 4,703,814 →
Application: 07/046,204 →
Rock Bit with Improved Extended Nozzle
Patent: 4,759,415 →
Application: 07/063,727 →
Differentially Hardfaced Rock Bit
Patent: 4,726,432 →
Application: 07/072,315 →
Downhole Pressure Fluctuating Feedback System
Patent: 4,775,016 →
Application: 07/102,173 →
Well Bore Data Transmission System with Battery Preserving Switch
Patent: 4,845,493 →
Application: 07/117,180 →
Conductor System for Well Bore Data Transmission
Patent: 4,914,433 →
Application: 07/183,572 →
Method for Manufacturing a Rotary Rock Bit with Improved Weld Root Geometry
Patent: 4,866,245 →
Application: 07/201,249 →
Rock Bit with Rigid Face Seals and Recessed Energizers
Patent: 4,923,020 →
Application: 07/210,681 →
Earth Boring Bit with Improved Two Piece Bearing and Seal Assembly
Patent: 4,903,786 →
Application: 07/210,682 →
Earth Boring Bit with Pin Mounted Compensator
Patent: 4,887,675 →
Application: 07/231,632 →
Related Assignments (7)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignors Interest. Aug 11, 1980
From: GALLE EDWARD M.
To: HUGHES TOOL COMPANY A DE. CORP.
Reel/Frame 003790/0951 →
Assignment of Assignors Interest. Aug 11, 1980
From: GALLE EDWARD M.
To: HUGHES TOOL COMPANY, A CORP. OF DEL.
Reel/Frame 003794/0619 →
Assignment of Assignors Interest. Sep 8, 1980
From: MORRIS WILFORD V.
To: HUGHES TOOL COMPANY
Reel/Frame 003799/0778 →
Assignment of Assignors Interest. Sep 19, 1980
From: PARISH, VERBLE W.
To: HUGHES TOOL COMPANY
Reel/Frame 003816/0955 →
Assignment of Assignors Interest. Feb 18, 1981
From: CUNNINGHAM ROBERT A.; DOLEZAL GEORGE E.
To: HUGHES TOOL COMPANY, A CORP. OF DE
Reel/Frame 003869/0112 →
Assignment of Assignors Interest. Mar 8, 1982
From: LEDGERWOOD, LEROY W. III
To: HUGHES TOOL COMPANY, A CORP. OF DE
Reel/Frame 003953/0865 →
Assignment of Assignors Interest. May 15, 1984
From: HUGHES TOOL COMPANY
To: HUGHES TOOL COMPANY - USA A CORP OF
Reel/Frame 004269/0060 →