Patent No. EP3100810 (titled "End Mill And Manufacturing Method For Cut Product") was filed by Kyocera on Jan 28, 2015. The application was issued on Sep 6, 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.
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