04523379 is referenced by 68 patents and cites 10 patents.

A safety utility knife includes a handle, a blade fixed to the forward end of the handle, and a retractable sheath which is received within the handle. A mechanism is provided for automatically retracting the sheath within the handle by depressing a single button at the rear of the handle.

Title
Knife with retractable sheath
Application Number
6/606317
Publication Number
4523379
Application Date
May 2, 1984
Publication Date
June 18, 1985
Inventor
Eric R Larson
San Francisco
CA, US
John D Burr
Redwood City
CA, US
Ralph F Osterhout
San Francisco
CA, US
Agent
Townsend & Townsend
Assignee
Tekna
CA, US
IPC
B26B 29/02
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