| 331 | Ultrasonic Welding Equipment | Company Product |
| 332 | Uncoilers | Company Product |
| 333 | Ultrasound Medical Equipment | Company Product |
| 334 | Ultrasonic Sensors | Company Product |
| 335 | Ultrasonic Power Supplies | Company Product |
| 336 | Ultrasonic Tank Meters | Company Product |
| 337 | Ultrasonic Thickness Indicators | Company Product |
| 338 | Ultrasonic Polishing Equipment | Company Product |
| 339 | Ultrasonic Flowmeters | Company Product |
| 340 | Ultrasonic Cleaning Equipment | Company Product |
| 341 | Ultrasonic Equipment & Supplies | Company Product |
| 342 | Ultraviolet Radiometers | Company Product |
| 343 | Ultraviolet Sterilizers | Company Product |
| 344 | Ultrasonic Generators | Company Product |
| 345 | Ultraviolet Purifiers | Company Product |
| 346 | Ultraviolet Lights | Company Product |
| 347 | Ultraviolet Equipment & Supplies | Company Product |
| 348 | Ultraviolet Erasers | Company Product |
| 349 | Ultraviolet Light Boxes | Company Product |
| 350 | Ultraviolet Meters | Company Product |
| 351 | U Bolts | Company Product |
| 352 | UHF Generators | Company Product |
| 353 | Ultraviolet Absorbers | Company Product |
| 354 | U Cup Packings | Company Product |
| 355 | Used Truck Dealers | Company Product |
| 356 | Ultrasonic Transducers | Company Product |
| 357 | Ultrasonic Testing Equipment | Company Product |
| 358 | Underground Storage Tanks | Company Product |
| 359 | Ultra Violet Purifiers | Company Product |
| 360 | Used Musical Instruments | Company Product |