| Tackle, Slack | 1454 |
| Tail Lights, Auto | 388 |
| Take-Up Reels | 1444 |
| Tally Counters | 1495 |
| Tally Register | 1495 |
| Tamping Bars | 1437 |
| Tape, Asbestos | 814 |
| Tape, Cable, Niagrite | 814 |
| Tape, Delta | 812 |
| Tape Measures | 1496 |
| Tape, Paper | 807 |
| Tapes, Binding | 811 |
| Tapes, Cotton | 810, 1496 |
| Tapes, Insulating | 803 |
| Tapes, Linen | 810, 1496 |
| Tapes, Steel | 1496 |
| Tape, Varnished | 808 |
| Taplets, Molding | 986 |
| Taps, Cable | 1044 |
| Taps, Current | 919, 979 |
| Tea Kettle | 600 |
| Tee Fittings | 1083 |
| Telefault | 313 |
| Telegraph Apparatus | 530 |
| Telegraph Keys | 531 |
| Telegraph Relays | 533 |
| Telegraph Sounders | 532, 535 |
| Teleheights | 314 |
| Telephone Apparatus | 96 |
| Telephone Apparatus, Railway | 92 |
| Telephone Booths | 93 |
| Telephone Brackets | 103 |
| Telephone Ringers | 103 |
| Telephones | 83 |
| Telephones, Desk | 89 |
| Telephones, Magneto | 83 |
| Telephones, Wall | 89 |
| Telephone Wires | 1312 |
| Telescoping Arms | 672 |
| Terminal Bushings, Brass | 1101 |
| Terminals | 371, 1041 |
| Terminals, Copper | 1041 |
| Terminals, Hook | 372 |
| Terminals, Primary | 372 |
| Terminals, Secondary | 372 |
| Terminals, Solderless | 371 |
| Terminals, Spring | 372 |
| Terminals, Wire | 372 |
| Test Clips | 342 |
| Tester, Portable Bond | 321 |
| Tester, Rail Bond | 318 |
| Testers, Electrolyte | 437 |
| Testing Batteries | 316 |
| Testing Galvanometers | 329 |
| Testing Instruments, Garage | 291 |
| Testing Meters, Lamp | 315 |
| Testing Outfit | 322 |
| Testing Sets | 324 |
| Testing Sets, Magneto | 104 |
| Testing Sets, Wireless Cable | 315 |
| Testing Sets, Portable | 328 |
| Test Sets | 104, 340 |
| Test Sets, Magneto | 104 |
| Theatre Dimmers | 645 |
| Thermometers | 436 |
| Thermometers, Shaler | 366 |
| Thimbles, Wire Rope | 1415, 1417 |
| Threaders, Pipe | 1485 |
| Timers, Pittsfield | 345 |
| Time Switches | 651 |
| Tin Reflectors | 729 |
| Tips, Cigar Lighter | 374 |
| Tire Pumps | 394 |
| Toasters, Electric | 597, 622 |
| Toasters, Hughes | 622 |
| Toaster Stoves | 613 |
| |
|
| Toggle Bolts | 1426 |
| Toggles | 1085 |
| Tool Bags | 1464, 1467 |
| Tool Bags, Canvas | 1467 |
| Tool Bags, Leather | 1464, 1467 |
| Tool, Buffalo Lineman's | 1449 |
| Tool Boxes | 393 |
| Tool Carts | 1441 |
| Tool Handles | 1455 |
| Tool Kits | 366, 1464, 1468 |
| Tool Kits, Pocket | 1464 |
| Tool Kits, Steel | 1468 |
| Tool Kits, Vulcanizing | 366 |
| Tool Sets, Auto | 1469 |
| Tool Sets, Hollow Handle | 1455 |
| Tools, Lineman's | 1450, 1454, 1464 |
| Tools, P & S | 934 |
| Tools, Shaping | 1494 |
| Tools, Wire | 1450 |
| Torches, Blow | 1488, 1491 |
| Torches, C. & L | 1488 |
| Torches, Lineman's, Staysalite | 1492 |
| Torches, Turner | 1491 |
| Toys, Electric | 558 |
| Track Dollys | 1441 |
| Transformers, A. & H. Type | 117 |
| Transformers, All-Nite-Lite | 641 |
| Transformers, Auto | 119 |
| Transformers, Bell Ringing | 479, 512 |
| Transformers, Constant and Series | 263 |
| Transformers, Constant Current | 261 |
| Transformers, Current | 311 |
| Transformers, Instrument | 311 |
| Transformers, Sign Lighting | 119, 513 |
| Transformers, Toy | 511, 513 |
| Transite Fireproof Lumber | 815 |
| Transmitter Arms | 103 |
| Transmitters | 105 |
| Transposition Brackets | 1393 |
| Treated Cloths | 808 |
| Treated Papers | 807 |
| Tree Insulators | 1402 |
| Tree Pruners | 1456 |
| Tree Trimmers | 1456 |
| Trimmers Rope | 785 |
| Trimmers, Tree | 1456 |
| Triplex Blocks | 1452 |
| Tripod, Iron | 760 |
| Trolley Wire | 1323 |
| Trolley Wire Grips | 1450 |
| Trouble Lamp | 379 |
| Trouble Lamp and Cigar Lighter | 375 |
| Trundy Soldering Iron Furnaces | 1492 |
| Tube and Carbon Cutters | 1460 |
| Tube Clamps | 366 |
| Tube Flux | 804 |
| Tubes, Fibre | 816 |
| Tubes, Porcelain | 1335 |
| Tubing, Asbestos | 814 |
| Tubing, Brass | 671 |
| Tubing, Flexible | 1091 |
| Tubing, Mica | 820 |
| Tubing, Soft Rubber | 822 |
| Tubular Fuses | 99 |
| Turnbuckles | 1413 |
| Turn Button Plug Switch | 381 |
| Turn Down Lamps, Hylo-Economical | 640 |
| Turner Fire Pots | 1492 |
| Turner Torches | 1491 |
| Tweezers, Wire, Electrician's | 1457 |
| Twine, Linen Armature | 819 |
| Twin Sockets | 977 |
| Twisting Wrenches | 1327 |
| Two and Three Wire Cleats | 1337 |
| Two Point Switches | 381 |
| Type C Mazda Lamps | 684 |
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