| Trademark | Trademark Holder |
|---|---|
| K-ASSAY | Kamiya Biomedical Company |
| K-Prime | Millipore Corp. |
| K-Resin | Phillips Petroleum Co. |
| K-STIM | BD (Becton, Dickinson and Company) |
| K'Nex | K'Nex Limited Partnership Group |
| K'Nex Education | K'Nex Limited Partnership Group |
| Kalrez | E.I. duPont de Nemours |
| Kangaroo | Control Co. |
| Kanigen | General American Transportation |
| Kanthal | Kanthal Group |
| Kantleke | Able Metal Hose |
| KAP | Thermo Fisher Scientific |
| Kapak | Kapak Corporation |
| KAPPA | Thermo Fisher Scientific |
| Kappler | Kappler USA |
| Kapseals | Warner-Lambert Co. |
| Kaptclean | Berlin Packaging |
| Kapton | E.I. duPont de Nemours |
| Kareta M | Draeger Safety |
| Karl Fischer | Karl Fischer GmbH |
| Kathon | Rohm and Haas |
| Kaydry | Kimberly-Clark Corp. |
| Kaydry Ex-L | Kimberly-Clark Corp. |
| KC1Δ | Trinity Biotech |
| KC4 | BioTek |
| KC4Δ | Trinity Biotech |
| KCjunior | BioTek |
| KeepIT | Wheaton |
| KeepIT-100 | Wheaton |
| Kel-F | 3M |
| Kelvitron | Thermo Fisher Scientific |
| Kem-Kit | Kimble Kontes |
| Kemtec | Aquaphoenix |
| Ken-A-Vision | Ken-A-Vision Mfg. Co. |
| Kena | Ken-A-Vision Manufacturing Company, Inc |
| Kendall | Tyco Healthcare Group LP |
| Kendro | Thermo Fisher Scientific |
| Kenwood | Kabushiki Kaisha Kenwood |
| Keprotec | Schoeller Textil AG |
| Keto-diastix | Bayer Corp. |
| KetoSite | GDS Technology, Inc. |
| Ketostix | Bayer Corp. |
| KEV | TOWA Corporation |
| Kevex | Thermo Fisher Scientific |
| Kevlar | E.I. duPont de Nemours |
| Kidde | Walter Kidde |
| Kiel Carbonate Device | Thermo Fisher Scientific |
| Kik-Step | Cramer Industries |
| KiloBase | GE Healthcare |
| Kiloprep | Millipore Corp. |
| Kim-Bin | Kimble Glass |
| Kim-Lok | National Scientific Co. |
| Kim-Pet | Kimble Glass |
| Kim-Snap | National Scientific Co. |
| Kimax | Kimble Glass |
| Kimax-51 | Kimble Glass |
| Kimberly-Clark | Kimberly-Clark Corp. |
| Kimberly-Clark Professional | Kimberly-Clark Corp. |
| Kimble | Kimble Glass |
| Kimble Chromatography | National Scientific Co. |
| Kimcare | Kimberly-Clark Corp. |
| KimCote | Kimble Chase |
| Kimflow | Kimble Glass |
| Kimguard | Kimberly-Clark Corp. |
| KimKap | Kimble Glass |
| Kimrak | Kimble Glass |
| Kimshield | Kimble Glass |
| KimSpring | Kimble Glass |
| KIMTECH | Kimberly-Clark Corp. |
| Kimtech Prep | Kimberly-Clark Corp. |
| Kimtech Pure | Kimberly-Clark Corp. |
| Kimtech Science | Kimberly-Clark Corp. |
| Kimtex | Kimberly-Clark Corp. |
| KimTite | Kimble Glass |
| Kimtowels | Kimberly-Clark Corp. |
| Kimwear | Kimberly-Clark Corp. |
| Kimwipes | Kimberly-Clark Corp. |
| Kinase-Glo | Promega Corp. |
| KinaseMax | Ambion, Inc. |
| Kindest Kare | Steris Corp. |
| KINEMATICA/POLYTRON | Brinkmann Instruments |
| King Pelican Lite | Pelican Products |
| KingFisher | Thermo Fisher Scientific |
| Kip | Kip Incorporated |
| Kjel-Sorb | Fisher Scientific |
| Kjeltab | Foss A/S |
| Kjeltec | Foss A/S |
| KlearInk | Sirchie Finger Print Laboratories |
| Klebosol | Societe Francaise Hoechst |
| Kleenex | Kimberly-Clark Corp. |
| KleenGuard | Kimberly-Clark Corp. |
| KleenGuard Extra | Kimberly-Clark Corp. |
| Kleenpak | Pall Corporation |
| Klimax | E.I. duPont de Nemours |
| Kling | Johnson & Johnson |
| Klinipath | Mercedes Medical |
| Klopman | Burlington Industries |
| Knauer | KNAUER |
| KNF | KNF Neuberger |
| KNF LAB | KNF Neuberger |
| Knifetec | Foss A/S |
| KNIpHE | Thermo Fisher Scientific |
| Knockdown | National Foam Inc. |
| Know Your Air | Imaging & Sensing Technology Corp. |
| KnowBody | Denoyer-Geppert |
| KO-LEC-PAC | ICLS Acquisition Company |
| KoaguLab | Johnson & Johnson |
| Kodachrome | Eastman Kodak Co. |
| Kodak | Carestream Health Inc. |
| Koehler | Koehler-Bright Star, Inc. |
| Kollect-A-Kem | JV Manufacturing |
| KolorSafe | JV Manufacturing |
| Kombi-Screen QL | Kontes Glass |
| Kombiscreen | Kontes Glass |
| KomfortGuard | Kimberly-Clark Corp. |
| Konica | Konica Corporation |
| KONTACT | Fisher Scientific |
| Kontes | Kimble Kontes |
| Kontron | Kontron Instruments |
| Kool-Grip | Guth Products Co. |
| Kooljacket | MicroClimate Systems |
| Kor-It | Richard Sandler |
| KoreKooler | Morning Pride Manufacturing |
| Koroseal | RJF International |
| KOVA | Kova International Inc. |
| KOVA-Trol | Kova International Inc. |
| Kovar | CRS Holdings |
| KP-C18-HS | Biotage |
| KP-NH | Biotage |
| KP-Sil | Biotage |
| KPG | Best Mfg. |
| Kresto | Stockhausen GmbH & Co. |
| Krisscross | Ansell |
| Kroflex | Mapa Pioneer |
| Kromasil | AKZO Nobel |
| KrudKatcher | Phenomenex, Inc. |
| Kryptofix | E. Merck Darmstadt |
| Krypton | Thermo Fisher Scientific |
| KRYPTOR | CIS bio international |
| Krytech | Mapa Pioneer |
| Krytox | E.I. duPont de Nemours |
| KSR | Ansell |
| Kut-Gard | PIP |
| Kwik-Diff | Thermo Fisher Scientific |
| Kwik-Draw | MSA |
| Kwik-Inject | Thermo Fisher Scientific |
| Kwik-Klip | Willson |
| KWIK-STIK | Microbiologics |
| Kwik-Wipes | Stockhausen GmbH & Co. |
| Kynar | Elf Atochem North America, Inc. |
| Kynar | Penn Walt Corp. |