Interlocking - Hexsticks

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Designer:Stewart Coffin
Craftsman:Stewart Coffin

Hexsticks is the wooden version of Hectix and is otherwise identical. Seven bars have two notches, three bars have three notches and two bars have one notch. Stewart documents three ways to solve the puzzle. A couple of people have contacted me and claimed to have found more. Stewart says baloney!
The plastic version was called Hectix and licensed to 3M in 1970. About 100,000 were made. Copies have appeared all over the planet. Stewart made about 150. Patent Number 3721448. Number 25A in his numbering system. Hectix is number 25.
Hexsticks was independently discovered by Bill Cutler around 1965.
More information in The Puzzling World of Polyhedral Dissections