19
Building glass; roofing, not of metal; windows, not of metal; window glass except for vehicle windows; window glass, for building; plate glass windows, for building; stained-glass windows; casement windows, not of metal; glass linings, not of metal, for building; glass coverings, not of metal, for building; cladding, not of metal, for building; glass facings, not of metal, for building; glass surfacings, not of metal, for building; glass wall linings, not of metal, for building; alabaster glass
21
Decorative glass not for building; enameled glass; glass, unworked or semi-worked except building glass; works of art, of glass; opal glass; opaline glass
37
Construction services, namely, construction, installation, maintenance and repair of roofing and cladding; installation, maintenance and repair of roofing, cladding, windows, window glass, plate glass windows, stained-glass windows, casement windows, glass linings, glass coverings, glass facings, glass surfacings, glass wall linings, enameled glass, works of art of glass, opal glass, and opaline glass in buildings and memorials; varnishing of glass; sanding of glass
40
Window tinting treatment, being surface coating; laminating of glass; laser scribing; burnishing by abrasion; glass staining; custom assembling of materials for others
42
Architectural consultation; industrial design; engineering; construction drafting; technical project studies, namely, research and surveys related to glass and objects made of glass