Patent Auction lists patented inventions for sale or license
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Patent Auction.com is an online marketplace for inventions protected by patent rights. There are patents for sale or license in all fields of industry.
You can freely browse through our entire database, starting from the categories below and if you have questions about any specific invention, you can contact the inventor directly through this site.
Inventors can list their patented inventions (or patent pending) for free. Listing your patent on Patent Auction is very easy. More...
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PatentAuction.com (previously known as FreePatentAuction.com) has been providing free patent listings since 2004 and will continue doing so in the future. It is the oldest and largest patent listings platform. We have put in relation thousands of inventors and potential buyers.
Patent Categories
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Newly listed patents |
Current price: |
Created: |
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 | 1. Crankless INTERNAL COMBUSTION ENGINE (18 views) | To be negotiated | 35 minutes ago |
| 2. eco-house quickly (eco-hq) (1 views) | To be negotiated | 3 hours ago |
| 3. Realtime Mileage Meter for all automobiles (20 views) | 100,000 USD | 9 hours ago | |
| 4. Thirst Monitoring Device (25 views) | 100,000 USD | 11 hours ago | |
| 5. Patent pending toilet seat with robotic wiping mechanism (28 views) | To be negotiated | 13 hours ago | |
| 6. Fingerprint Sensing device using pulse processing (57 views) | To be negotiated | 22 hours ago | |
| 7. Watkins Jujube Healthcare Drink-A New Compound Beverage. (41 views) | + 1 Million USD | 1 day ago | |
| 8. One design replacing 3 others (41 views) | To be negotiated | 1 day ago | |
| 9. Device for testing packet-switched cellular radio network (77 views) | To be negotiated | 2 days ago | |
| 10. Clamp for wheelie bin liners (110 views) | To be negotiated | 2 days ago | |
| 11. VISIBLE MOLECULAR STRUCTURE IN LIQUID CHEMICAL SAMPLES (58 views) | To be negotiated | 2 days ago | |
| 12. Thin film type PZT glide head for hard disk (77 views) | To be negotiated | 2 days ago | |
| 13. NONDESTRUCTIVE SENSOR USING HYBRID MAGNETIC (76 views) | To be negotiated | 2 days ago | |
| 14. Flaw detecting system of micro-type (73 views) | To be negotiated | 2 days ago | |
| 15. Non-destructive sensor for Magnetic leakage testing (70 views) | To be negotiated | 2 days ago |
Most viewed patents |
Current price: |
Created: |
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| 1. Permanent MAGNET MOTOR - Magnetic Energy Storage / OUTPUT (26331 views) | To be negotiated | 4 years ago |
| 2. Micro Mirrors Shield Protecting Earth from Global Warming (9379 views) | To be negotiated | 4 months ago |
| 3. Firearm SILENCER (6427 views) | To be negotiated | 2 years ago |
| 4. Concealed Carry --- Trigger SAFETY CLIP (4386 views) | To be negotiated | 2 years ago |
| 5. Hi efficiency DIP TUBE for WATER HEATER (4156 views) | To be negotiated | 2 years ago |
| 6. BIOPSY NEEDLE - SOFT TISSUE - END CUTTING (4045 views) | To be negotiated | 2 years ago |
| 7. ONE PIECE HINGE -- TORSIONING STEEL (3779 views) | To be negotiated | 2 years ago |
| 8. Trailer Hitch MOTORCYCLE TOWING (3564 views) | To be negotiated | 2 years ago |
| 9. Ultra sonic 3-Diminsional CASTING with COMPOSITES (3530 views) | To be negotiated | 2 years ago |
| 10. OPEN Sterile -- Food CONTAINER SEAL - (3389 views) | To be negotiated | 2 years ago |
| 11. FREQUENCY TUNABLE - ACOUSTIC INSULATION -- (3375 views) | To be negotiated | 2 years ago |
| 12. ANTITHERMAL SHIELD FOR ROCKETS (2882 views) | + 1 Million USD | 10 months ago |
| 13. THE FLAMING ASS-HOLE.. AUTOMATIC AIR FRESHENER.. FARTOMATIC (2857 views) | To be negotiated | 1 year ago |
| 14. 7,000,000,000 USERS ARE WAITING FOR THIS 360° ROTATION PILLOW! (2721 views) | To be negotiated | 11 months ago |
| 15. REVOLVER SAFETY - Selectable Lockable -- (2715 views) | To be negotiated | 2 years ago |
| 16. Toothpaste Dispensing Toothbrush Cap- Patent For Sale! (2704 views) | 50,000 USD | 1 year ago |
| 17. REACTIVE CAR SUSPENSION -- COMPOUND TORSION (2630 views) | To be negotiated | 2 years ago |
| 18. ABSORBENT WATER BATERY SET UP IN THE VAT OF OIL TRANSFORMERS (2482 views) | + 1 Million USD | 10 months ago |
| 19. Receipt Card Systems, Consumer Electronic Receipt Archiving (2477 views) | To be negotiated | 9 months ago |
| 20. REACTIVE CAR SUSPENSION --- PARALLEL TORSION (2469 views) | To be negotiated | 2 years ago |
| 21. SPEED LOADER -- FLEX to load Lay-out flat to conceal (2370 views) | To be negotiated | 2 years ago |
| 22. LED Tire Stick (2220 views) | To be negotiated | 1 year ago |
| 23. Clutch or BRAKE PADS w/ auto wear indicator (2192 views) | To be negotiated | 2 years ago |
| 24. Vending Machine - SLOT PROTECTOR (2144 views) | To be negotiated | 2 years ago |
| 25. Forearm Crutch Putter (2059 views) | To be negotiated | 2 years ago |
| 26. Driving Shoe Heel Protector. TM -Domain (2051 views) | 50,000 USD | 1 year ago |
| 27. Internal Combustion Engine - Hybrid Engine - Stirling Engine (1986 views) | + 1 Million € | 1 year ago |
| 28. Automatic fan speed control according to room temperature (1975 views) | To be negotiated | 10 months ago |
| 29. The Bloody Red Infinite Heart of My Virgina Sun (1890 views) | 666,926 € | 1 year ago |
| 30. Rings an bracelets an trademark SWJ for sale. (1849 views) | To be negotiated | 1 year ago |
| 31. FREE COMPRESSION TUBE FOR ROCKETS (1806 views) | + 1 Million USD | 6 months ago |
| 32. iQplug - Plug and Play Electrical Wiring System (1743 views) | To be negotiated | 1 year ago |
| 33. Superior Cure Against Schism (split) In The Phren (psyche) (1741 views) | 992,266 € | 1 year ago |
| 34. Pear Pirate (1663 views) | 10,000 $ | 2 years ago |
| 35. Propulsion system for scuba diver (1621 views) | 250,000 $ | 1 year ago |
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