![Amazon.com: Opinel Carbon Steel Folding Pocket Knife - Every Day Carry Blades with Viroblock Safety Lock and Wooden Handle (No. 10) (2540109) : Sports & Outdoors Amazon.com: Opinel Carbon Steel Folding Pocket Knife - Every Day Carry Blades with Viroblock Safety Lock and Wooden Handle (No. 10) (2540109) : Sports & Outdoors](https://m.media-amazon.com/images/I/71e303odm6L._AC_UF350,350_QL80_.jpg)
Amazon.com: Opinel Carbon Steel Folding Pocket Knife - Every Day Carry Blades with Viroblock Safety Lock and Wooden Handle (No. 10) (2540109) : Sports & Outdoors
![Is it legal to use an opinel locking system patent? What I see on USPTO is that the patent is expired, so I want to use it, does anyone know? : r/knives Is it legal to use an opinel locking system patent? What I see on USPTO is that the patent is expired, so I want to use it, does anyone know? : r/knives](https://i.redd.it/scntsngr4p691.png)
Is it legal to use an opinel locking system patent? What I see on USPTO is that the patent is expired, so I want to use it, does anyone know? : r/knives
![Amazon.com: Opinel Carbon Steel Folding Pocket Knife - Every Day Carry Blades with Viroblock Safety Lock and Wooden Handle (No. 10) (2540109) : Sports & Outdoors Amazon.com: Opinel Carbon Steel Folding Pocket Knife - Every Day Carry Blades with Viroblock Safety Lock and Wooden Handle (No. 10) (2540109) : Sports & Outdoors](https://m.media-amazon.com/images/I/815Q-WiBfIL._AC_UF350,350_QL80_.jpg)
Amazon.com: Opinel Carbon Steel Folding Pocket Knife - Every Day Carry Blades with Viroblock Safety Lock and Wooden Handle (No. 10) (2540109) : Sports & Outdoors
![Finished customizing my Opinel 8. Blade and locking mechanism are acid etched and stone washed. Handle is sanded so that it fits better in the hand and is covered with wood stain Finished customizing my Opinel 8. Blade and locking mechanism are acid etched and stone washed. Handle is sanded so that it fits better in the hand and is covered with wood stain](https://preview.redd.it/reorrx9ssgr51.jpg?width=640&crop=smart&auto=webp&s=57b61a169647db46179f07dc5441ba475c6971f2)