Compasses writing implement
Concave diffraction grating and a manufacturing method thereof
Conic section compass
Construction layout marking device
Control method of sheet-driven type automatic drafting machine
Control system for eyeglass tracer
Control system for ruling blazed, aberration corrected diffracti
Copying device for tailor's trade
Copying tracer particularly for stamping machines
Cord clamp for drafting board assembly
Corner marking device
Cotton swab line marking means
Cuff cutter apparatus
Cursor assembly
Cutting guide for custom mats
Cutting machine
Cutting system
Cutting tee square
Cutting tee square