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Overall Chronology
1917~1939 1940~1959 1960~1979 1980~1999 2000~
Name of an Era Company History Product Chronology
1942 Nagoya Satellite Office
(currently Nagoya branch) established.		  
1943  

Car retarder system
(former Japanese National Railway's Shin-Tsurumi marshaling yard)
1947 Kyodo Kogyo Co., Ltd
(currently Kyosan Seiki Co., Ltd. )established.		  
1949 Stock listed on the Tokyo Stock
Exchange.		  
1950     Selenium rectifier
Selenium rectifier
Selenium rectifier
1951   Time code type CTC equipment
1952 Kyushu Satellite Office
(currently Kyushu branch) established.		  
1954   Type B cab warning device
1956   AF track circuit device
1957 Joint venture with
International Rectifier (U.S.) to establish Nihon International Seiryuki Co., Ltd.(currently Nihon Inter Electronics Corporation).		   
1958
Headquarters office(Complete it in 1958.)
Headquarters office(Complete it in 1958.)
 Type A and C cab warning devices
 Multistage systematic traffic signal
  controller
   Silicon rectifier
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