IP Library › Granted Patent US 12,720,239
Granted Patent B2
US 12,720,239 · App. 18/567,840 · Granted Aug 25, 2026

Wavelength cross connect device, and wavelength cross connect method

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Quick Facts
Patent No.
US 12,720,239
App. No.
18/567,840
Filed
Dec 7, 2023
Granted
Aug 25, 2026
Kind
B2
Art Unit
2634
USPC
398/50
Assignments (2)
CHANGE OF NAME Recorded Aug 14, 2025
From: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
To: NTT, INC.
Reel/Frame 072471/0579 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 12, 2023
From: NAKAGAWA, MASAHIRO; KAWAHARA, HIROKI; SEKI, TAKESHI
To: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Reel/Frame 065836/0863 →
Continuity (1)
Related Publication 20240284079A1 · Aug 22, 2024
References Cited (5)
US 20020015551A1 · Tsuyama et al. · 2002 [cited by examiner]
US 20200274633A1 · Yuki · 2020 [cited by examiner]
US 20220077949A1 · Kato · 2022 [cited by examiner]
JP 2018191109 · 2018 [cited by applicant]
Napoli et al., “Perspectives of multi-band optical communication systems,” The 23rd OptoElectronics and Communications Conference (OECC 2018) Technical Digest, Jul. 2-6, 2018, Jeju, Korea, 2 pages. [cited by applicant]