|
The ornamental design for an exterior wiper head for drill pipe, as shown and described. |
|||||||||||||||||
FIG. 1 is a top and front perspective view of an exterior wiper head for drill pipe showing our new design;
FIG. 2 is a bottom and rear perspective view;
FIG. 3 is a side elevational view;
FIG. 4 is another side elevational view;
FIG. 5 is a rear elevational view;
FIG. 6 is a front elevational view;
FIG. 7 is a top plan view; and,
FIG. 8 is a bottom plan view thereof.
FIGS. 1 and 2 have been drawn on an enlarged scale with respect to FIGS. 3-8.
Mason, Ronald J., Mason, Steven B.
| Patent | Priority | Assignee | Title |
| Patent | Priority | Assignee | Title |
| 4494607, | May 09 1983 | NATIONAL BANK OF ANDREWS | Method of cleaning and inhibiting sucker rod corrosion |
| 4703804, | Jun 20 1986 | Gearhart Industries, Inc. | Debris removal and gauge ring device and method |
| 4895205, | Oct 19 1987 | Pipe washer and chemical applicator system | |
| 5101896, | Oct 19 1987 | Pipe wiper and washer system | |
| 223685, | |||
| D285798, | Jun 09 1983 | Set of pillars and bushes | |
| D296559, | Nov 13 1984 | HARDINGE INC | Draw tube adapter |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Date | Maintenance Fee Events |
| Date | Maintenance Schedule |