JISA8402-1982 is not a patent, it is a Japanese standard, similar to China's national standard GB-XXXX.
JIS=Japanese Industrial Standards
Corresponding codes in JIS: A-civil engineering and construction; B-general machinery; C electrical and electronics; D-automobile; E-railway; F -Shipping; G-steel; H-non-ferrous metals; K-chemistry; L-fiber; M-mining; P-pulp, paper; Q-management system; R-furnace industry; S-daily necessities; T-medical safety equipment ;W-aviation;X-information processing;Z-others.
A-Civil Engineering and Construction
JISA8402-1982 is an old standard. It was promulgated in 1982. It has been 30 years old. It has been updated for a long time and is useless. It cannot be found online. It can only be found in Japan's standardization department or a very professional place to find books to check