Patent Searching

The FreePatentsOnline search engine is one of the most powerful, fastest and easiest patent search engines on the web. Our search allows advanced search techniques such as word stemming, proximity searching, relevancy ranking and search term weighting to help you find exactly what you are looking for. And, our account features let you organize, annotate and share documents, and Alerts let you instantly be notified when new documents of interest are published.

Document Delivery

All documents are available in a highly-compressed PDF format for fast downloading, with or without searchable text. Create Free Account.

Patent Plaques

The "Plaque It!" function allows inventors or companies to showcase their intellectual property by creating a virtual patent plaque with just one click. The resulting plaque code can be used on web sites, blogs, social networking sites, etc. as an attractive way of linking to the full text on the document on the FreePatentsOnline web site. If you or your company own a patent, Try it Now!

News & Updates

FreePatentsOnline now offers chemical search! Through entry of chemicals via SMILES, the patent database can be searched using normalized chemical formulas to ensure much more comprehensive searching than possible using regular keywords. Try it out now.

Most Popular Patenting Companies

IBM Canon HP Panasonic Samsung Micron Microsoft Hitachi Toshiba 3M

Most Popular Patent Topics

Computers: Control Computers Permitting Access
Software: Finance
Telecom: Cell Phones Communications Telephones
Medical: Heart Surgery Cosmetic Surgery Dentistry Obesity Surgery Instruments Splints and Bandages Cancer Respiratory
Drugs: Drugs Vasodialators Gene Therapy
Measurement & Testing: Flow Meter Mass Probe and Sensors Geometric Instruments
Electronics: Audio Signal Processing
Chemistry: Bonding Molecular Biology Liquid Purification
Imaging: Optical Systems
Health: Exercise Devices (1) Exercise Devices (2) Food Weight Loss and Supplements Cooking Surgical Procedures
Industrial: Land Vehicles Metal Working Metals Nonmetallic Processes Pipe Couplings Cabinet Structure Manufacturing Materials Light Fixtures Bodies and Tops for Vehicles Internal-Combustion Engines Heat Accumulators Special Receptacle or Package Power Conveyor Refrigeration Hydraulic Engineering Ships
Material Handling: Vacuum Handling Swinging Support Cutting Grinding Vehicle Attached Fluids Scrubbing and Cleaning Article Carriers Dispensing
Buildings and Construction: Vibration and Earthquake Isolation Gutter-related Screen Walls Air Ventilation Supports Lighting Racks Sign Displays Furnaces Locks and Fasteners Shelving Ladders and Scaffolds Flexible or Portable Panels Construction
Home and Fashion: Apparel Baths & Closets Beds Bedrooms Chairs
Husbandry: Animal Plant
Recreation: Games Fishing and Trapping Toys
Electrical: Conductors and Insulators Solar and Geothermal Heating Systems and Devices Outlets Connectors Measuring and Testing