Markers History at johnabeason blog

Markers History. Few realize that the approval process for these outdoor signs varies widely by state. Rosenthal, introduced a new gadget;

Historical Marker
from www.senate.michigan.gov

why historical markers matter. De groft patented the official ‘marking pen’ in a form that we would begin to recognise today: A glass jar with a felt wick.

Historical Marker

Markers Historythe first modern (and usable) marker pen was sidney rosenthal's “magic marker,” which he invented and started selling in 1953. This marker had a glass.the first modern (and usable) marker pen was sidney rosenthal's “magic marker,” which he invented and started selling in 1953. Rosenthal, introduced a new gadget;