Patent No. EP3903549 (titled "Soil Working Machine, Preferably Agricultural Harrow, And Method For Adjusting A Tensioning Force On A Harrow") was filed by Horsch Maschinen on Mar 31, 2021. The application was issued on Dec 27, 2023.

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.
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
Apr 29, 2026
Apr 29, 2026
Apr 29, 2026
Apr 28, 2026
Apr 28, 2026
Apr 28, 2026
Mar 12, 2026
Mar 10, 2026
Mar 10, 2026
Mar 4, 2026
Mar 4, 2026
Mar 4, 2026
Aug 4, 2025
Aug 4, 2025
Aug 4, 2025
Aug 4, 2025
Aug 4, 2025
Aug 4, 2025
Feb 14, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Feb 11, 2025
Oct 11, 2024
Oct 11, 2024
Oct 4, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Sep 27, 2024
Jan 9, 2024
Nov 30, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Nov 17, 2023
Jul 28, 2023
Jul 28, 2023
Jul 28, 2023
Jul 28, 2023
Jul 28, 2023
Jul 28, 2023
Jun 1, 2023
May 2, 2022
May 2, 2022
May 2, 2022
May 2, 2022
May 2, 2022
Mar 1, 2022
Nov 8, 2021
Oct 6, 2021
Sep 24, 2021
Sep 24, 2021
Sep 24, 2021
Sep 24, 2021
Sep 15, 2021
May 14, 2021
May 14, 2021
Mar 31, 2021
Mar 31, 2021
Mar 31, 2021
Mar 31, 2021
Mar 31, 2021
Mar 31, 2021
Mar 31, 2021
Mar 31, 2021