Patent No. EP4083286 (titled "Knitting Needle") was filed by Feng on Dec 30, 2020. The application was issued on Feb 12, 2025.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| GROZ BECKERT | Nov 12, 2025 | WEBER |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
Get instant alerts for new documents
Nov 26, 2025
Nov 26, 2025
Nov 18, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Nov 12, 2025
Feb 25, 2025
Jan 16, 2025
Dec 27, 2024
Dec 27, 2024
Dec 27, 2024
Dec 27, 2024
Dec 19, 2024
Dec 19, 2024
Nov 4, 2024
Nov 4, 2024
Nov 4, 2024
Nov 4, 2024
Nov 4, 2024
Nov 4, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Sep 16, 2024
Jun 25, 2024
Jun 25, 2024
May 15, 2024
May 15, 2024
May 15, 2024
May 15, 2024
May 15, 2024
May 15, 2024
May 15, 2024
Jan 23, 2024
Jan 23, 2024
Jan 15, 2024
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
Nov 22, 2023
May 26, 2023
May 8, 2023
May 8, 2023
May 8, 2023
May 8, 2023
Apr 24, 2023
Nov 28, 2022
Nov 28, 2022
Oct 6, 2022
Aug 1, 2022
Aug 1, 2022
Aug 1, 2022
Jul 29, 2022
Jul 29, 2022
Jul 29, 2022
Jul 29, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
Jul 25, 2022
May 30, 2022
May 28, 2022
Aug 9, 2021
Aug 9, 2021
Aug 9, 2021
Aug 9, 2021
Jul 22, 2021
Jul 22, 2021
Jul 22, 2021