Inventor
TAKESHI UMEKI
Inventor
JP
Overview
Patents· 20 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
G02Fprimary
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein51%
G02BOptical elements, systems or apparatus19%
H04BTransmission11%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light5%
H04JMultiplex communication5%
C30BSingle-crystal growth3%
H05FStatic electricity3%
H10NElectric solid-state devices not otherwise provided for3%
PatentTitleYear
12,574,136Optical amplification system, optical amplification apparatus and optical amplification method202612,346,000Planar optical waveguide device for measuring amplitude phase of squeezed light202512,339,564Wavelength conversion apparatus202512,153,325Wavelength converter202412,085,836Optical amplifier202412,032,269Wavelength conversion apparatus202412,007,666Wavelength conversion element and method for producing same202411,971,644Wavelength conversion device202411,892,745Wavelength conversion element and method for manufacturing same202411,888,528Optical communication system202411,852,953Optical element and manufacturing method thereof202311,815,715Planar optical waveguide device202311,815,785Wavelength conversion optical element202311,768,421Wavelength conversion device202311,740,537Optical signal processing circuit202311,733,584Wavelength conversion apparatus202311,644,735Wavelength conversion element202311,442,225Wavelength conversion element and method for manufacturing wavelength conversion element202211,385,521Wavelength conversion apparatus202211,387,909Optical signal transmitter2022Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2022–2025Patents assigned to NIPPON TELEGRAPH & TELEPHONE (19)· patent assignee history
2022–2026Based in JP· patent location history
2026Patents assigned to NTT INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| NIPPON TELEGRAPH & TELEPHONE | 19 | 2022–2025 |
| NTT INC | 1 | 2026 |
Locations
| Location | Patents | Span |
|---|---|---|
| JP | 20 | 2022–2026 |