Writing instrument identification process and device
Writing medium unit for writing or drawing machines
Writing pressure-changing device for recording device or the lik
Writing system
Writing translator mount
Wrong sign toner extraction for a direct electrostatic printer
X, Y plotter
X-Y distinguishable multi-trace coding for multiparameter record
X-Y multiplex drive circuit and associated ink feed connection f
X-Y Plotter
X-Y plotter drive roller arrangement
X-Y plotter for non-perforated paper
X-Y plotter incorporating non-impact, liquid jet recording instr
Xerographic electronic printer
Xeroprinting using a corona charge injection modifying material
XY plotter apparatus
XY recorder
Zero level correction apparatus