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.

Patent Research Tools

FreePatentsOnline has created a number of widgets for the patent professional and those interested in intellectual property. These include:
  • Google Toolbar Plugin - Add the FreePatentsOnline search to the Google Toolbar.
  • Search Box - Put the FreePatentsOnline search on your site!
  • Patent Plaque - Inventors and Assignees can create virtual plaques to showcase their inventions and link to the full text of their patent.

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

Boeing Cisco Broadcom General Electric IBM Canon HP Panasonic Samsung Micron Microsoft Hitachi Toshiba 3M

Most Popular Patent Topics

Computers: Control Computers Permitting Access
Software: Finance Dynamic IR File Management Card Processing Data Processing
Telecom: Cell Phones Communications Telephones
Medical: Heart Surgery Cosmetic Surgery Dentistry Obesity Surgery Instruments Splints and Bandages Prosthesis Light Application 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, Chemical Applications Protein
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 Bearings Epoxy
Material Handling: Vacuum Handling Swinging Support Cutting Grinding Vehicle Attached Fluids Scrubbing and Cleaning Article Carriers Dispensing Spraying Sorters
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 Door Related Flexible or Portable Panels Construction
Home and Fashion: Apparel Baths & Closets Beds Bedrooms Cutlery Jars and Bottles Clothing Chairs Bags
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, Electrical Applications