Ensso has designed an all-in-one fountain pen with scale ruler for architects and engineers, graded with imperial and metric scales.

The USMA promotes metric system training programs for teachers nationwide, but funding for such programs is generally limited to fees and support from private companies such as metric ruler ...

The wide end of each inboard rear-floor stowage bin has a 15-inch ruler molded into the plastic, and the narrower outboard edge features a 26-centimeter metric ruler. Now no matter where in the ...