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. Pet umbrella and combined pet leash and umbrella (40 views) | To be negotiated | 21 hours ago |
| 2. Crankless external combustion engine (89 views) | To be negotiated | 1 day ago | |
| 3. Variable compression ratio (VCR) mechanism (81 views) | To be negotiated | 1 day ago | |
| 4. Mechanism to provide desmodromic variable valve control for ICE (73 views) | To be negotiated | 1 day ago | |
| 5. Crankless INTERNAL COMBUSTION ENGINE (89 views) | To be negotiated | 1 day ago |
| 6. eco-house quickly (eco-hq) (56 views) | To be negotiated | 1 day ago |
| 7. Realtime Mileage Meter for all automobiles (64 views) | 100,000 USD | 2 days ago | |
| 8. Thirst Monitoring Device (69 views) | 100,000 USD | 2 days ago |
| 9. Toilet seat with integrated robotic wiping mechanism (81 views) | To be negotiated | 2 days ago |
| 10. Fingerprint Sensing device using pulse processing (85 views) | To be negotiated | 2 days ago | |
| 11. Watkins Jujube Healthcare Drink-A New Compound Beverage. (70 views) | + 1 Million USD | 3 days ago | |
| 12. One design replacing 3 others (69 views) | To be negotiated | 3 days ago | |
| 13. Device for testing packet-switched cellular radio network (99 views) | To be negotiated | 3 days ago | |
| 14. Clamp for wheelie bin liners (130 views) | To be negotiated | 3 days ago | |
| 15. VISIBLE MOLECULAR STRUCTURE IN LIQUID CHEMICAL SAMPLES (69 views) | To be negotiated | 4 days ago |
Most viewed patents |
Current price: |
Created: |
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| 1. Permanent MAGNET MOTOR - Magnetic Energy Storage / OUTPUT (26361 views) | To be negotiated | 4 years ago |
| 2. Micro Mirrors Shield Protecting Earth from Global Warming (9389 views) | To be negotiated | 4 months ago |
| 3. Firearm SILENCER (6440 views) | To be negotiated | 2 years ago |
| 4. Concealed Carry --- Trigger SAFETY CLIP (4396 views) | To be negotiated | 2 years ago |
| 5. Hi efficiency DIP TUBE for WATER HEATER (4163 views) | To be negotiated | 2 years ago |
| 6. BIOPSY NEEDLE - SOFT TISSUE - END CUTTING (4053 views) | To be negotiated | 2 years ago |
| 7. ONE PIECE HINGE -- TORSIONING STEEL (3789 views) | To be negotiated | 2 years ago |
| 8. Trailer Hitch MOTORCYCLE TOWING (3575 views) | To be negotiated | 2 years ago |
| 9. Ultra sonic 3-Diminsional CASTING with COMPOSITES (3538 views) | To be negotiated | 2 years ago |
| 10. OPEN Sterile -- Food CONTAINER SEAL - (3397 views) | To be negotiated | 2 years ago |
| 11. FREQUENCY TUNABLE - ACOUSTIC INSULATION -- (3386 views) | To be negotiated | 2 years ago |
| 12. ANTITHERMAL SHIELD FOR ROCKETS (2905 views) | + 1 Million USD | 10 months ago |
| 13. THE FLAMING ASS-HOLE.. AUTOMATIC AIR FRESHENER.. FARTOMATIC (2870 views) | To be negotiated | 1 year ago |
| 14. 7,000,000,000 USERS WAITING FOR THE FIRST 360° ROTATION PILLOW (2736 views) | To be negotiated | 11 months ago |
| 15. REVOLVER SAFETY - Selectable Lockable -- (2719 views) | To be negotiated | 2 years ago |
| 16. Toothpaste Dispensing Toothbrush Cap- Patent For Sale! (2718 views) | 50,000 USD | 1 year ago |
| 17. REACTIVE CAR SUSPENSION -- COMPOUND TORSION (2636 views) | To be negotiated | 2 years ago |
| 18. ABSORBENT WATER BATERY SET UP IN THE VAT OF OIL TRANSFORMERS (2492 views) | + 1 Million USD | 10 months ago |
| 19. Receipt Card Systems, Consumer Electronic Receipt Archiving (2488 views) | To be negotiated | 9 months ago |
| 20. REACTIVE CAR SUSPENSION --- PARALLEL TORSION (2471 views) | To be negotiated | 2 years ago |
| 21. SPEED LOADER -- FLEX to load Lay-out flat to conceal (2371 views) | To be negotiated | 2 years ago |
| 22. LED Tire Stick (2229 views) | To be negotiated | 1 year ago |
| 23. Clutch or BRAKE PADS w/ auto wear indicator (2195 views) | To be negotiated | 2 years ago |
| 24. Vending Machine - SLOT PROTECTOR (2145 views) | To be negotiated | 2 years ago |
| 25. Forearm Crutch Putter (2061 views) | To be negotiated | 2 years ago |
| 26. Driving Shoe Heel Protector. TM -Domain (2056 views) | 50,000 USD | 1 year ago |
| 27. Internal Combustion Engine - Hybrid Engine - Stirling Engine (1991 views) | + 1 Million € | 1 year ago |
| 28. Automatic fan speed control according to room temperature (1979 views) | To be negotiated | 10 months ago |
| 29. The Bloody Red Infinite Heart of My Virgina Sun (1896 views) | 666,926 € | 1 year ago |
| 30. Rings an bracelets an trademark SWJ for sale. (1853 views) | To be negotiated | 1 year ago |
| 31. FREE COMPRESSION TUBE FOR ROCKETS (1819 views) | + 1 Million USD | 7 months ago |
| 32. iQplug - Plug and Play Electrical Wiring System (1747 views) | To be negotiated | 1 year ago |
| 33. Superior Cure Against Schism (split) In The Phren (psyche) (1746 views) | 992,266 € | 1 year ago |
| 34. Pear Pirate (1675 views) | 10,000 $ | 2 years ago |
| 35. Propulsion system for scuba diver (1629 views) | 250,000 $ | 1 year ago |
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