The ornamental design for a surgicalknife, as shown and described.
1., 3. Surgical knives
1 1 : Perspective
1.2 : Front
1.3 : Top
1.4 : Bottom
1.5 : Right
1.6 : Left
1.7 : Enlarged perspective view
1.8 : Enlarged front view
1.9 : Enlarged top view
1.10 : Enlarged bottom view
1.11 : Enlarged left view
3.1 : Perspective
3.2 : Front
3.3 : Top
3.4 : Bottom
3.5 : Right
3.6 : Left
3.7 : Enlarged perspective view
3.8 : Enlarged front view
3.9 : Enlarged top view
3.10 : Enlarged bottom view
3.11 : Enlarged left view
In the reproductions, the dot-dot broken lines are for the purpose of illustrating environment only and form no part of the claimed design. The dash-dot broken lines are for the purpose of illustrating claim boundaries and from no part of the claimed design.