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The ornamental design for a guard for derrick apparatus, as shown and described.
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FIG. 1 is a perspective view of a design for a guard for derrick apparatus according to the present invention.
FIG. 2 is a first side perspective view of the guard of FIG. 1.
FIG. 3 is a second side perspective view of the guard of FIG. 1, opposite to the first side.
FIG. 4 is a first side view of the guard of FIG. 1.
FIG. 5 is a second side view of the guard of FIG. 1, opposite the first side shown in FIG. 4.
FIG. 6 is a top view of the guard of FIG. 1; and,
FIG. 7 is a bottom view of the guard of FIG. 1.
Folk, Robert Alden, Folk, Steven Lorne
| Patent | Priority | Assignee | Title |
| D551682, | Sep 08 2006 | VARCO I P, INC | Guard for well operations apparatus |
| D552628, | Sep 08 2006 | VARCO I P, INC | Guard for well operations apparatus |
| D712934, | Feb 20 2013 | FLSMIDTH A S | Guard |
| Patent | Priority | Assignee | Title |
| 4030364, | May 20 1976 | Square D Company | Safety guard for press brakes |
| 4080846, | Mar 03 1977 | KASEGA INVESTMENTS LIMITED, | Machinery guard |
| 4449596, | Aug 03 1982 | VARCO I P, INC | Drilling of wells with top drive unit |
| 4529045, | Mar 26 1984 | VARCO INTERNATIONAL, INC , A CA CORP | Top drive drilling unit with rotatable pipe support |
| 4605077, | Dec 04 1984 | VARCO I P, INC | Top drive drilling systems |
| 4813493, | Apr 14 1987 | TRITEN CORPORATION, 5915 BRITTMORE ROAD, HOUSTON, TEXAS 77041 A CORP OF TEXAS | Hydraulic top drive for wells |
| 4872517, | Feb 08 1988 | TRITEN CORPORATION, A CORP OF TEXAS | Rotatable fluid conductor for well apparatus |
| 5107940, | Dec 14 1990 | Hydratech; HYDRATECHNOLOGY, INC , D B A HYDRATECH, A CORP OF TX | Top drive torque restraint system |
| 5433279, | Jul 20 1993 | Tesco Corporation | Portable top drive assembly |
| 6276450, | May 02 1999 | VARCO I P, INC | Apparatus and method for rapid replacement of upper blowout preventers |
| 6536520, | Apr 17 2000 | Wells Fargo Bank, National Association | Top drive casing system |
| 6679333, | Oct 26 2001 | CANRIG DRILLING TECHNOLOGY, LTD | Top drive well casing system and method |
| 6688398, | Aug 24 1998 | WEATHERFORD TECHNOLOGY HOLDINGS, LLC | Method and apparatus for connecting tubulars using a top drive |
| 6705405, | Aug 24 1998 | WEATHERFORD TECHNOLOGY HOLDINGS, LLC | Apparatus and method for connecting tubulars using a top drive |
| 6725938, | Dec 24 1998 | WEATHERFORD TECHNOLOGY HOLDINGS, LLC | Apparatus and method for facilitating the connection of tubulars using a top drive |
| 20040221994, | |||
| 20050269072, | |||
| 20050269104, | |||
| 20050274508, | |||
| 20050279492, | |||
| 20050279507, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| May 28 2005 | Varco I/P, Inc. | (assignment on the face of the patent) | / | |||
| Aug 03 2005 | FOLK, STEVEN LORNE | VARCO I P, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016888 | /0334 | |
| Aug 05 2005 | FOLK, ROBERT ALDEN | VARCO I P, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016888 | /0334 |
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