Tadashige Hakoyama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Ship navigation assisting device
- Patent number 11,776,411
- Issue date Oct 3, 2023
- TOKYO KEIKI INC.
- Tadashige Hakoyama
- G01 - MEASURING TESTING
Information Patent Grant
Navigation display apparatus for collison avoidance utilizing polyg...
- Patent number 5,515,287
- Issue date May 7, 1996
- Tokimec Inc.
- Tadashige Hakoyama
- G08 - SIGNALLING

Patents Applicationslast 30 patents

Information Patent Application
SHIP NAVIGATION ASSISTING DEVICE
- Publication number 20200410869
- Publication date Dec 31, 2020
- TOKYO KEIKI INC.
- Tadashige HAKOYAMA
- G01 - MEASURING TESTING