| 4289133 | Cut-through backup washer for the scalpel of an intraluminal surgical stapling instrument | September, 1981 | Rothfuss | 128/334C |
| 4304236 | Stapling instrument having an anvil-carrying part of particular geometric shape | December, 1981 | Conta et al. | 128/325 |
| 4351466 | Disposable instrument for surgical fastening | September, 1982 | Noiles | 227/8 |
FIG. 1 is a side perspective view of a circular anastomosis surgical stapler showing our new design;
FIG. 2 is a side elevation thereof;
FIG. 3 is an end elevation as seen from the left of FIG. 1;
FIG. 4 is an end elevation as seen from the right of FIG. 1; and
FIG. 5 is a top plan view thereof.