buckets and parts therefor, namely, clam shell type, ditcher, hoe, ladder-type dredge, orange peel type, conveyor, elevator and loader types; power shovel dipper parts, namely, dipper bucket points and adaptors for dipper buckets; racking; stone grapples; centrifugal dredge pumps and parts therefor; slushing scrapers, and dredge tumblers; apron feeder parts, namely, pans, links, pins, sprockets, idlers and rollers; grate bars; grizzly bars; bearing bushings; bearings; bedplates for paper stock beaters; blades for ballast spreaders, bulldozers and road graders; cams; catheads; conveyor and power-transmission chains and links, pins, and attachments therefor; chutes and parts therefor; driving clutches; crusher concaves, jaws and mantles; hoisting and winding drums; conveyor flights; gears and pinions for machinery; tractor grousers; conveyor gudgeons; wire-rope guides; pulverizer hammers and rings; tamping roller heads; liners for crushers, grinding mills, mixers, pulverizers, pumps and tumbling barrels; log-dogs; log turners; paddles for log washers, mixers and sintering machines; conveyor pans; screening machinery plates and machine wearing plates; rollers, namely, bucket-ladder, conveyor, incline, kiln, mooring-chock, towline and tractor types; rolls, namely, anvil, briquette, crusher, forging and grinding types; roll-crusher shells; screws for spiral conveyors; shoes for snow-plows and sweepers; teeth for buckets, crusher rolls, clinker grinders, rippers and scarifiers; teeth repointers; stamp-mill parts, namely, dies, shoes, tappets; wheels for conveyors, bridge and monorail type cranes, sawmill carriages, and aerial tramways; crown, gear, idler, kicker, pinion, sheave, sprocket, traction and trolley wheels for machinery; treads for tractor and power-shovel crawlers; precipitation baffles; bearing rings and rollers," in International Class 7.