| 90312785 | QWIKPAD | Mainstream Engineering Corporation | 6453274 |
| 76612800 | QWIKSERVICE | Mainstream Engineering Corporation | 3069849 |
| 50059025 | QWIKCLEAN | Mainstream Engineering Corporation | — |
| 50004725 | DVC COOLING | Mainstream Engineering Corporation | — |
| 50004683 | DVC LABS | Mainstream Engineering Corporation | — |
| 50004601 | DVC | Mainstream Engineering Corporation | — |
| 75148538 | QWIK PM | Mainstream Engineering Corporation | 2094850 |
| 87014367 | QWIKSWAP | Mainstream Engineering Corporation | 5216465 |
| 99614274 | QWIKPRODUCTS | Mainstream Engineering Corporation | 8390309 |
| 99941271 | BIG OL' BLOWHARD | Mainstream Engineering Corporation | — |
| 87033449 | QWIKDESCALER+ | Mainstream Engineering Corporation | 5108742 |
| 87023167 | OTTOBON | Mainstream Engineering Corporation | 5835117 |
| 88812572 | QWIKPRODUCTS | Mainstream Engineering Corporation | 6209314 |
| 90203965 | AGREFINE | Mainstream Engineering Corporation | 6289469 |
| 76545319 | QWIKCLEAN | Mainstream Engineering Corporation | 3010003 |
| 98891468 | QWIKCLEAN | Mainstream Engineering Corporation | 8140719 |
| 88880644 | QWIKPAD | Mainstream Engineering Corporation | 6186812 |
| 88797624 | QWIKTREAT | Mainstream Engineering Corporation | 6141213 |
| 74731278 | QWIKCHECK | Mainstream Engineering Corporation | 1995635 |
| 76538040 | PMTECH | Mainstream Engineering Corporation | 2922140 |
| 86375702 | QWIK608 | Mainstream Engineering Corporation | 4763461 |
| 88443791 | QWIKBRIGHT | Mainstream Engineering Corporation | 5953748 |
| 86496417 | MAINSTREAM ENGINEERING | Mainstream Engineering Corporation | 4840007 |
| 98650035 | MAINSTREAM MARINE | Mainstream Engineering Corporation | 7760439 |
| 88015871 | MAINSTREAM MARINE | Mainstream Engineering Corporation | 5785336 |
| 87473330 | KINOGO | Mainstream Engineering Corporation | 5525996 |
| 98650110 | RECU | Mainstream Engineering Corporation | — |
| 87791589 | QWIKHURRICANE | Mainstream Engineering Corporation | 5513871 |
| 87281501 | QWIK CO | Mainstream Engineering Corporation | 5394284 |
| 86211266 | QWIKGLOWPRO | Mainstream Engineering Corporation | 4713882 |
| 87864995 | QWIKSHOT | Mainstream Engineering Corporation | 5616225 |
| 86378490 | QWIKSMOKE | Mainstream Engineering Corporation | 4716128 |
| 86187248 | QWIKLUG | Mainstream Engineering Corporation | 4580188 |
| 76377530 | PURACLEAN | Mainstream Engineering Corporation | 2824427 |
| 74279721 | QWIKCLEAN | Mainstream Engineering Corporation | 1754893 |
| 85695673 | QWIKSEER+ WATT SAVER | Mainstream Engineering Corporation | 4292426 |
| 76360052 | DO IT RIGHT, DO IT QWIK! | Mainstream Engineering Corporation | 2662825 |
| 76670554 | QTHERM | Mainstream Engineering Corporation | 3534457 |
| 86804499 | QWIKSEAL | Mainstream Engineering Corporation | 5273750 |
| 76374425 | SOLUTIONS THROUGH ADVANCED TECHNOLOGY | Mainstream Engineering Corporation | 2718822 |
| 87694628 | AGRIORGANIC | Mainstream Engineering Corporation | — |
| 85669024 | QWIKSEER+ | Mainstream Engineering Corporation | 4292104 |
| 75955169 | QWIK LOOK | Mainstream Engineering Corporation | 2514339 |
| 75955167 | QWIK FIND | Mainstream Engineering Corporation | 2514338 |
| 75935491 | QWIK CLEAN-UP | Mainstream Engineering Corporation | 2514280 |
| 86417158 | TRICONWIND | Mainstream Engineering Corporation | 4825349 |
| 86526875 | QWIKGLOPRO | Mainstream Engineering Corporation | 4795243 |
| 76046169 | QWIK BOOST | Mainstream Engineering Corporation | 2465561 |
| 86243017 | SPIFFCASH | Mainstream Engineering Corporation | 4725226 |
| 90077352 | PURACLEAN | Mainstream Engineering Corporation | — |