| Trademark | Trademark Holder |
|---|
| Kalrez | E.I. duPont de Nemours |
| Kangaroo | Control Co. |
| Kanigen | General American Transportation |
| Kanthal | Kanthal Group |
| Kantleke | Able Metal Hose |
| Kapak | Kapak Corporation |
| 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 |
| KaryoMAX | Thermo Fisher Scientific |
| KARYOSTAT | Thermo Fisher Scientific |
| K-ASSAY | Kamiya Biomedical Company |
| Kathon | Rohm and Haas |
| Kaydry | Kimberly-Clark Corporation |
| Kaydry Ex-L | Kimberly-Clark Corporation |
| KC1Δ | Trinity Biotech |
| KC4Δ | Trinity Biotech |
| KDALERT | Thermo Fisher Scientific |
| KeepIT | Wheaton |
| KeepIT-100 | Wheaton |
| Kel-F | 3M Company |
| Kem-Kit | Kimble Kontes |
| Kemtec | Aquaphoenix |
| Kena | Ken-A-Vision Manufacturing Company, Inc |
| Ken-A-Vision | Ken-A-Vision Mfg. Co. |
| Kendall | Tyco Healthcare Group LP |
| Kendro | Thermo Fisher Scientific |
| Kenwood | Kabushiki Kaisha Kenwood |
| Keprotec | Schoeller Textil AG |
| Keto-diastix | Bayer Corporation |
| KetoSite | GDS Technology, Inc. |
| Ketostix | Bayer Corporation |
| KEV | TOWA Corporation |
| Kevlar | E.I. duPont de Nemours |
| KEYTEK | Thermo Fisher Scientific |
| Kidde | Walter Kidde |
| Kik-Step | Cramer Industries |
| KilobaseBINDER | Thermo Fisher Scientific |
| KILORAD PTZ | Thermo Fisher Scientific |
| Kimax | Gerresheimer Glass Inc. |
| Kimax-51 | Gerresheimer Glass Inc. |
| Kimberly-Clark | Kimberly-Clark Corporation |
| Kimberly-Clark Professional | Kimberly-Clark Corporation |
| Kimble | Gerresheimer Glass Inc. |
| Kimcare | Kimberly-Clark Corporation |
| KimCote | Kimble Chase |
| Kimguard | Kimberly-Clark Corporation |
| KimKap | Gerresheimer Glass Inc. |
| KIM-LOK | Thermo Fisher Scientific |
| KIM-SNAP | Thermo Fisher Scientific |
| KIMTECH | Kimberly-Clark Corporation |
| Kimtech Prep | Kimberly-Clark Corporation |
| Kimtech Pure | Kimberly-Clark Corporation |
| Kimtech Science | Kimberly-Clark Corporation |
| Kimtex | Kimberly-Clark Corporation |
| Kimtowels | Kimberly-Clark Corporation |
| Kimwear | Kimberly-Clark Corporation |
| Kimwipes | Kimberly-Clark Corporation |
| Kinase-Glo | Promega Corporation |
| KinaseMax | Thermo Fisher Scientific |
| Kindest Kare | Steris Corporation |
| Kindle | Amazon Technologies, Inc. |
| Kindle Fire | Amazon Technologies, Inc. |
| 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 |
| Klean-AR | Avantor Performance Materials, Inc. |
| KlearInk | Sirchie Finger Print Laboratories |
| Klebosol | Societe Francaise Hoechst |
| Kleenex | Kimberly-Clark Corporation |
| KleenGuard | Kimberly-Clark Corporation |
| KleenGuard Extra | Kimberly-Clark Corporation |
| Kleenpak | Pall Corporation |
| Kling | Johnson & Johnson |
| Klinipath | Mercedes Medical |
| Klopman | Burlington Industries |
| Knauer | KNAUER |
| K'Nex | K'Nex Limited Partnership Group |
| K'Nex Education | K'Nex Limited Partnership Group |
| KNF | KNF Neuberger |
| KNF LAB | KNF Neuberger |
| Knifetec | Foss A/S |
| KNIpHE | Thermo Fisher Scientific |
| Knockdown | National Foam Inc. |
| KnockOut | Thermo Fisher Scientific |
| Know Your Air | Imaging & Sensing Technology Corporation |
| KnowBody | Denoyer-Geppert |
| KoaguLab | Johnson & Johnson |
| Kodachrome | Eastman Kodak Co. |
| Kodak | Carestream Health Inc. |
| Koehler | Koehler-Bright Star, Inc. |
| KO-LEC-PAC | ICLS Acquisition Company |
| Kollect-A-Kem | JV Manufacturing |
| KolorSafe | JV Manufacturing |
| Kombiscreen | Kontes Glass |
| Kombi-Screen QL | Kontes Glass |
| KomfortGuard | Kimberly-Clark Corporation |
| KONELAB | Thermo Fisher Scientific |
| Konica | Konica Corporation |
| Kontes | Kimble Kontes |
| Kontron | Kontron Instruments |
| Kool-Grip | Guth Products Co. |
| Kooljacket | MicroClimate Systems |
| KoreKooler | Morning Pride Manufacturing |
| Kor-It | Richard Sandler |
| Koroseal | RJF International |
| KOVA | Kova International Inc. |
| Kovar | CRS Holdings |
| KOVA-Trol | Kova International Inc. |
| KP-C18-HS | Biotage |
| KP-NH | Biotage |
| K-Prime | Merck KGaA |
| KP-Sil | Biotage |
| K-Resin | Phillips Petroleum Co. |
| Kresto | Stockhausen GmbH & Co. |
| Krios | Thermo Fisher Scientific |
| Krisscross | Ansell |
| Kroflex | Mapa Pioneer |
| Kromasil | AKZO Nobel |
| Krome Orange | Beckman Coulter, Inc. |
| KrudKatcher | Phenomenex, Inc. |
| Kryptofix | Merck KGaA |
| Krypton | Thermo Fisher Scientific |
| KRYPTOR | CIS bio international |
| Krytech | Mapa Pioneer |
| Krytox | E.I. duPont de Nemours |
| KSR | Ansell |
| K-STIM | BD (Becton, Dickinson and Company) |
| Kut-Gard | PIP |
| Kwik-Diff | PHC Holding Corporation |
| Kwik-Klip | Willson |
| KWIK-STIK | Microbiologics |
| Kwik-Wipes | Stockhausen GmbH & Co. |
| Kynar | Elf Atochem North America, Inc. |
| Kynar | Penn Walt Corporation |
