[Class : 9] Mathematical Instruments, Teaching, Apparatus, Measuring Instruments[Class : 16] Writing Instruments, Their Spares And Parts, Leads (Black Or Other Colours) Required For Pencils, Colour Pencils, Pastles, Sketching Pens And Parts Thereof, Writing And Sketching Inks, Mechanical Pencil, Pens, Refill, Artistic Colours, Artists Materials, Artists Brushes, Stencils, Stencil Inks, Adhesives (Stationery) And Marking Inks, Board Clips, Drawing Boards By Artists Materials, Adhesives Tapes, Carbon Papers, Wire Staple Presses, Staple Press Pins, Clips, Nibs, Erasers, Sharpeners Mathematical Drawing Instruments, Geometry Boxes And Student Requisites