Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12391552 | Polycrystalline cubic crystal boron nitride and tool | Hitoshi Sumiya | 2025-08-19 |
| 11845658 | Polycrystalline cubic boron nitride and heatsink using the same | Satoru Kukino | 2023-12-19 |
| 11795113 | Cubic boron nitride sintered material | Akito Ishii, Katsumi Okamura, Hisaya Hama, Issei NAGASHIMA | 2023-10-24 |
| 11787699 | Diamond polycrystal and method of producing the same | Hitoshi Sumiya, Kensei Hamaki, Katsuko Yamamoto | 2023-10-17 |
| 11453589 | Method of producing boron nitride polycrystal, boron nitride polycrystal, cutting tool, wear-resisting tool, and grinding tool | Hitoshi Sumiya | 2022-09-27 |
| 11383306 | Method for producing polycrystalline diamond body, polycrystalline diamond body, cutting tool, wear-resistance tool and grinding tool | Hitoshi Sumiya | 2022-07-12 |
| 11319255 | Composite sintered material and tool using same | Satoru Kukino, Michiko Matsukawa | 2022-05-03 |
| 11041791 | Indenter made of polycrystalline diamond, and method and apparatus using the same for evaluating crack initiation load | Kensei Hamaki, Katsuko Yamamoto, Hitoshi Sumiya | 2021-06-22 |
| 10703636 | Composite polycrystal and method for manufacturing the same | Takeshi Sato, Hitoshi Sumiya | 2020-07-07 |
| 10562822 | Cubic boron nitride polycrystalline material, cutting tool, wear resistant tool, grinding tool, and method of manufacturing cubic boron nitride polycrystalline material | Katsuko Yamamoto, Hitoshi Sumiya | 2020-02-18 |
| 10519068 | Cubic boron nitride polycrystal, cutting tool, wear-resistant tool, grinding tool, and method of producing cubic boron nitride polycrystal | Keiko Arimoto, Katsuko Yamamoto, Hitoshi Sumiya | 2019-12-31 |
| 10421129 | Polycrystalline diamond body, cutting tool, wear-resistant tool, grinding tool, and method for producing polycrystalline diamond body | Keiko Arimoto, Katsuko Yamamoto, Hitoshi Sumiya | 2019-09-24 |
| 9663371 | Polycrystalline diamond body, cutting tool, wear-resistant tool, grinding tool, and method for producing polycrystalline diamond body | Katsuko Yamamoto, Hitoshi Sumiya | 2017-05-30 |
| 9416304 | Cubic boron nitride complex polycrystal and manufacturing method therefor, and cutting tool, wire-drawing die and grinding tool | Hitoshi Sumiya | 2016-08-16 |