| Trademark | Trademark Holder |
|---|
| O.S. | Quidel Corp. |
| O/H Pak | North Safety Products |
| O'GeneRuler | Thermo Fisher Scientific |
| O'RangeRuler | Thermo Fisher Scientific |
| Oaktec | Oak Technical Inc. |
| Oaktex | Oak Technical Inc. |
| Oakton | Cole-Parmer Instrument Co. |
| Oasis | Kimberly-Clark Corp. |
| Ob-Scertainer | Lab-Aids, Inc. |
| Obelisc | Sielc Technologies |
| Oberon | Oberon |
| OBSERVA | Biomerieux, Inc. |
| Observer | Orion |
| OccuLux | OccuNomix |
| Occunomix | Occunomix International |
| Occupational Hazards | Occupational Hazards, Inc. |
| Ocelot | Boekel Scientific |
| Octapette | Corning |
| Octastrip | Corning |
| Octocolumn | Promega Corp. |
| OdoClave | Bel-Art Products |
| OdorGone | Decon Laboratories |
| Odormycin | Temuka Diagnostics Limited |
| Odorplex | Sage Pharmaceuticals |
| Odyssey | LI-COR Biosciences |
| Oertling | W & T Avery Ltd. |
| Office Depot | Office Depot, Inc. |
| OfficeDuster | Advantus Corporation |
| Officemate | Chen, Peter |
| Offset | North Safety Products |
| Ohaus | Ohaus Corp. |
| Ohm-Cide | Static Solutions Inc. |
| Ohm-Shield | Static Solutions Inc. |
| Ohm-Stat | Static Solutions Inc. |
| OI | Detector Electronics Corporation |
| OIA | Inverness Medical |
| Oil-X | domnick hunter |
| OK | Propper Manufacturing |
| OK-1 | OK-1 Manufacturing Co., Inc. |
| OligoStandards | Thermo Fisher Scientific |
| Olympus | Olympus America Inc. |
| Omaha Steaks | Omaha Steaks International, Inc. |
| oMALDI | Applera Corp. |
| OMEGA | CamelBak Products |
| Omega | Pall Corporation |
| Omega | Contec Inc. |
| Omega Shield | Microflex Medical |
| Omni | Ansell |
| Omni International | Omni International |
| Omni Prep | Omni International |
| Omni Tip | Omni International |
| Omni-Brite | Avery Dennison Corporation |
| Omni-Flo | Haws Corporation |
| Omni-Pette | Wheaton Inc. |
| Omni-Reacto Station | Thermo Fisher Scientific |
| OMNI-Sampler | Thermo Fisher Scientific |
| Omni-Vial | Wheaton Inc. |
| OMNIC | Thermo Fisher Scientific |
| OmniCap | Omnifit, Ltd. |
| Omnifit | Omnifit, Ltd. |
| OmniFLEX | Bruker Daltonics |
| OmniGlow | OmniGlow Corporation |
| OmniMix | Cepheid Corporation |
| OmniPac | Thermo Fisher Scientific |
| OmniPur | EM Industries, Inc. |
| OmniScribe | Allen Datagraph |
| OmniSette | Fisher Scientific |
| OmniSolv | EM Industries, Inc. |
| Omnispense | Wheaton Inc. |
| OmniSwab | Whatman Inc. |
| OmniTech | Omni International |
| OmniTray | Iomega Corp. |
| OmniTrust | Omni International |
| OMNIView | Applied Materials, Inc. |
| On-Target | Thermo Fisher Scientific |
| ON-TARGETplus | Thermo Fisher Scientific |
| ONE Broth | Thermo Fisher Scientific |
| One Click | Mettler Toledo |
| One Shot | Invitrogen |
| One Source, Infinite Solutions | Fisher Scientific |
| ONE SOURCE. INFINITE SOLUTIONS. | Fisher Scientific |
| One Touch | Aearo Technologies |
| One Touch | LifeScan, Inc. |
| One Touch II Data Dock | Johnson & Johnson |
| One-Fit | Sperian |
| ONE-Glo | Promega Corp. |
| One-Sep | Wheaton Inc. |
| One-Shot | Technical Concepts L.P. |
| One-Step | Corning |
| One-Stop PlugShop | Moldex |
| One-Touch | Thermo Fisher Scientific |
| One-Touch Calibration | Thermo Fisher Scientific |
| One-Touch Measurement | Thermo Fisher Scientific |
| OneHand | Simport Plastics |
| OnePette | Corning |
| OneStep | Bradley Corp. |
| Onguard | Onguard |
| ONYX | Coulter International Corp. |
| Onyx | MSA |
| Op-Tema | Willson |
| OpArrays | Operon Biotechnologies, Inc. |
| Open Access | Thermo Fisher Scientific |
| OPEN BIOSYSTEMS | Thermo Fisher Scientific |
| Open Windows | Cogent Data Technologies, Inc. |
| Open-Center Stay | Ergodyne Corporation |
| OpenGL | Silicon Graphics, Inc. |
| Opera | Opera Software ASA |
| Opera Software | Opera Software ASA |
| Operation Space Chase | Learning Resources, Inc. |
| Operational Simplicity | Thermo Fisher Scientific |
| Operon | Operon Biotechnologies, Inc. |
| OpHyb | Operon Biotechnologies, Inc. |
| Opossum | Owl Separation Systems |
| Opsys | Thermo Fisher Scientific |
| Opsys MR | Thermo Fisher Scientific |
| Opti-Aid | Bradley Fixture |
| Opti-Freeze | MP Biomedicals |
| Opti-Guard | Optimize Technologies |
| Opti-Klens | Desert Assembly, Inc. |
| Opti-Lok | Optimize Technologies |
| Opti-Seal | Optimize Technologies |
| Opti-Soft | Cardinal Health |
| Opti-Solv | Optimize Technologies |
| Opti-TOF | AB SCIEX |
| OptiBeam | AB SCIEX |
| OptiBind | Thermo Fisher Scientific |
| OptiCell | Thermo Fisher Scientific |
| Opticlear | Kimble Glass |
| OptiClone | MP Biomedicals |
| Opticon | Bio-Rad Laboratories |
| Opticul | BD (Becton, Dickinson and Company) |
| OptiDry | Fisher Scientific |
| OptiFilter | MSA |
| Optifreeze | MP Biomedicals |
| OptiGrow | Fisher Scientific |
| Optik-Wipes | Fisher Scientific |
| OptiLink | Thermo Fisher Scientific |
| Optilux | BD (Becton, Dickinson and Company) |
| Optiluxiso | BD (Becton, Dickinson and Company) |
| Optima | Fisher Scientific |
| Optima LCMS | Fisher Scientific |
| OptimAir | MSA |
| Optimase | Transgenomic, Inc. |
| OptiMatrixx | Leica Microsystems, Inc. |
| Optimax FT | Cardinal Health |
| Optime | Aearo Technologies |
| Optimizer | Millipore Corp. |
| Optimuff | Howard Leight |
| Optimum Results | Thermo Fisher Scientific |
| OptiPhase | Optiphase, Inc. |
| OptiPlate | Packard Instrument Co. |
| OptiPrep | Nycomed Amersham International |
| OptiPro | Smart Solutions |
| OptiQuant | Thermo Fisher Scientific |
| OptiRead | Thermo Fisher Scientific |
| Optisorb | Bacou-Dalloz |
| Optispeed | Labconco |
| OptiStart | Invitrogen |
| Optitran | Schleicher & Schuell |
| Optizyme | Fisher Scientific |
| Optrel | Sperian |
| OPUS | PB Diagnostic Systems |
| Oracle | Oracle Corporation |
| Oragene | DNA Genotek |
| Orange County Choppers | Orange County Choppers Design Properties, LLC LTD |
| Oranyl | Otis Clapp & Son |
| Oranylplus | Otis Clapp & Son |
| Orbit | Thermo Fisher Scientific |
| Orbitrap | Thermo Fisher Scientific |
| Orbitrap Elite | Thermo Fisher Scientific |
| Orbitrap Velos Pro | Thermo Fisher Scientific |
| Orbitron I | Boekel Scientific |
| Orbitron II | Boekel Scientific |
| ORBO | Supelco, Inc. |
| Oregon | Skedco, Inc. |
| Oregon Green | Molecular Probes, Inc. |
| Organex-Q | Millipore Corp. |
| Organicfree | Thermo Fisher Scientific |
| Organization Station | Learning Resources, Inc. |
| Origen | Igen Inc. |
| OriGene | OriGene Technologies, Inc. |
| Orion | Thermo Fisher Scientific |
| Orion | MSA |
| Orion | Thermo Fisher Scientific |
| Orion | Willson |
| Orion Star | Thermo Fisher Scientific |
| Orion Starts | Thermo Fisher Scientific |
| Orlon | E.I. duPont de Nemours |
| ORPTestr | Cole-Parmer Instrument Co. |
| Orthane | EP Scientific |
| Ortho Stand | Tennessee Mat Company, Inc. |
| Ortho-Clinical Diagnostics | Johnson & Johnson |
| Orthoclone OKT | Johnson & Johnson |
| Osborn Scientific | Osborn Scientific Group |
| OSHACoach | Safety Software, Inc. |
| OSHALOG | Safety Software, Inc. |
| OSM | Organic Sales & Marketing, Inc. |
| Osmette | Precision Systems |
| Osmette A | Precision Systems |
| Osmette II | Precision Systems |
| Osmette III | Precision Systems |
| Osmette S | Precision Systems |
| Osmette XL | Precision Systems |
| Osmonics | GE Osmonics |
| OSOM | Genzyme Corporation |
| OSTEOMARK | Ostex International, Inc. |
| Oster | Sunbeam Corporation |
| Osterizer | Sunbeam Corporation |
| Ostex | Ostex International, Inc. |
| OTG | Uvex Safety |
| OTT-LITE | Environmental Lighting Concepts, Inc. |
| Otter Boxes | Otter Products |
| Outer Banks | Jasper Textiles, Inc. |
| Outlaw | American Allsafe Co. |
| Outlook | Microsoft Corp. |
| Ovation | VistaLab Technologies |
| Over-the-Spill | Rubbermaid |
| Overdrive | Wheaton Inc. |
| OvuKIT | Quidel Corp. |
| Ovuquick | Quidel Corp. |
| Owl | Thermo Fisher Scientific |
| OX | Aearo Technologies |
| Oxford | Oxford Worldwide LLC |
| Oxi | WTW Measurement Systems |
| OxiCal | WTW Measurement Systems |
| OxiFerm | BD (Becton, Dickinson and Company) |
| OxiTop | WTW Measurement Systems |
| Oxoid | Oxoid Inc. |
| Oxone | E.I. duPont de Nemours |
| OXSAS | Thermo Fisher Scientific |
| Oxscan | Thermo Fisher Scientific |
| Oxy-Max | Alltech Associates |
| Oxy-Swab | Thermo Fisher Scientific |
| Oxy-Trap | Alltech Associates |
| OXYTUNE | Thermo Fisher Scientific |
| Oyster | Extech Instruments Corp. |