Penmanship improving device
Pipefitter's protractor
Pivoting panel system
Plastic pipe part provided with a groove
Pleating device
Portable device for finding and positioning and storing the...
Portable drafting device
Portable drawing surface with interchangeable components
Portable mini parallel rule
Portable retractable erasable writing surface
Positioning device
Production of engine-divided scales
Production of helical rulings
Production of rulings such as those of diffraction gratings
Progressive stencil set and method of drawing
Retractable-pin stabilizers on a wallboard t-square
Roller blotter
Roller blotter
Rotary blotter
Rule protractor