YK

Yutaro Kumagai

AU Audio-Technica: 26 patents #4 of 180Top 3%
SA Sato: 2 patents #61 of 223Top 30%
Overall (All Time): #133,490 of 4,157,543Top 4%
28
Patents All Time

Issued Patents All Time

Showing 1–25 of 28 patents

Patent #TitleCo-InventorsDate
D1057704 Pick-up cartridge Maiko Mizoguchi 2025-01-14
D1055905 Pick-up cartridge Aya Mashimo 2024-12-31
D1042329 Battery charger for earphones Yosuke Takubo, Yuki Nojiri 2024-09-17
D1035611 Headphone Kodai Tsubone, Takashi Nara 2024-07-16
D1031689 Speaker Tomoyuki Narumi 2024-06-18
D1031691 Headphone Kodai Tsubone, Takashi Nara 2024-06-18
D1030719 Earphone Yosuke Takubo, Yuki Nojiri 2024-06-11
D1029800 Earphone Yosuke Takubo, Hiroaki Kokubun 2024-06-04
D1029787 Headphone Nonomi Shiwaku Fukushima 2024-06-04
D1028928 Headphone Nonomi Shiwaku Fukushima 2024-05-28
D1028876 Battery charger for earphones Yosuke Takubo, Hiroaki Kokubun 2024-05-28
D1024942 Battery charger for earphones Daisuke Yoneyama, Takashi Nara 2024-04-30
D1018495 Headphone Kodai Tsubone 2024-03-19
D1016779 Headphone Kodai Tsubone 2024-03-05
D1008215 Headphone Nonomi Shiwaku 2023-12-19
D1003855 Headphone Nonomi Shiwaku 2023-11-07
D1003854 Headphone Nonomi Shiwaku 2023-11-07
D1002585 Earphone Yosuke Takubo, Hiroaki Kokubun 2023-10-24
D997123 Headphone headband support Nonomi Shiwaku 2023-08-29
D997133 Earphone Daisuke Yoneyama, Takashi Nara 2023-08-29
D997122 Speaker pattern for a headphone Nonomi Shiwaku 2023-08-29
D956718 Equalizer Mai Kudo, Shinobusa Yura, Kazuyuki Ishihara 2022-07-05
D938934 Headphone Kodai Tsubone 2021-12-21
D929324 Battery charger Hiroto Oba 2021-08-31
D929323 Battery charger Hiroto Oba 2021-08-31