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Surgical Patents

Below is a list of the surgical patents filed in John Gilbert Collison, Sr.'s lifetime. Those listed are covered in greater detail in the book.

• Collison Cruciate Head Bone Screw - Patent# 2,494,229 filed in 1946; issued in 1950.
• Trochanteric Plate - Patent# 2,612,159 filed in 1949; issued in 1952.
• Collison Trochanteric Hip Prosthesis & Artificial Femoral Head - Patent# 2,682,265 filed in 1951; issued posthumously in 1954.

Illustration from patent filing for the
Collison Cruciate Head Bone Screw