Stupid little things that bug you

P. L. Robertson ( Canadian Inventor) invented the Robertson screw and screwdriver in 1906 and received the Canadian patent in 1907 (CA103387, U.S. Patent CA103387A) and US patent 1911 (U.S. Patent 1,003,657) for a manufacturing machine.
Nope, not having it
 

Don't have an account? Register now and see fewer ads!

SIGN UP
Back
Top
  AdBlock Detected
Bluemoon relies on advertising to pay our hosting fees. Please support the site by disabling your ad blocking software to help keep the forum sustainable. Thanks.