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7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
[oil well drilling and production equipment-namely, swab mandrels, sinker bars, tubular jars, wire rope sockets, retainer rings, automatic wire stripper releases,] rod and tubing guides, rod and tubing strippers[, blowout preventors, ] drill pipe protectors[ and packer valve seals]
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9
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
[pressure gauges]
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17
Rubber, gutta-percha, gum, asbestos, mica and goods made from these materials and not included in other classes; plastics in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, not of metal.
[rubber goods-namely], swab cups, oil saver rubbers[, oil saver bushings, pressure packers, packer rubbers, pipeline crossing separators, grout bags, bumpers, cushions and shock absorbers for use with and attachment to boat docks, landings, and marine drilling platforms, grout packers and closure plugs]