Rules are made to be broken
When is a rule not a rule? When it's four rules! This deceptively simple rolling ruler offers an unexpected "twist" on the conventional design. Made of what appears to be…
More patent sticks
Here is a trio of glorified wooden sticks for ruling parallel lines that each somehow managed to secure patent protection. Two are so similar that they could easily be mistaken…
Rule Britannia
When it comes to patented rulers, it's difficult to concieve of anything more basic than this particular example. It consists simply of a pentagonal section ebonised rod with the end…