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● 1969/30 -	Establishes headquarter and Tokyo factory in 4-47 Arakawa Arakawa-ku, Tokyo.
/10 -	C.E.O.　Katsumi Nakano.　Company registration.
-	Develops the electrostatic capacity type level meter. Starts manufacturing and releasing. Gets a good deal of order from Osaka Shiseido, CEMEDINE and so on.

● 1970/03 -	Successes developing level meter for deep wells LIC-100 . Starts releasing.

● 1971/05 -	Moves headquarter and Tokyo factory into 5-6 Arakawa Arakawa-ku, Tokyo to enhance business.
/09 -	Develops and mass-produces oily-water separator level meter LIC-70 (renamed LIC-75).

● 1972/06 -	Develops level meter for mining industry LIC-45. It wins popularity as a level meter for mineral.

● 1973/09 -	Obtains the explosion-proof license of the electrostatic capacity type LIC-47 series from National Institute of Industrial Safety, Ministry of Labor （the present National Institute of Industrial Safety Independent Administrative Institution）.

● 1974/06 -	Moves headquarter and Tokyo factory into 5-2-6 Arakawa Arakawa-ku, Tokyo to enhance business

● 1975/06 -	Develops the electrostatic capacity type LIC-48, and releases.

● 1976/01 -	Obtains the explosion-proof license of the electrostatic capacity type LIC-50 series from National Institute of Industrial Safety, Ministry of Labor.

● 1977/03 -	Obtains the explosion-proof license of the electrostatic capacity type LIC-50TP series from National Institute of Industrial Safety, Ministry of Labor.

● 1978/09 -	Obtains the explosion-proof license of the electrostatic capacity type LIC-48AP series from National Institute of Industrial Safety, Ministry of Labor.
/07 -	Establishes FELLOW KEISOKU ,Ltd in Himeji-shi, Hyogo.
/12 -	Obtains the explosion-proof license of the electrostatic capacity type LIC-50EX series from National Institute of Industrial Safety, Ministry of Labor.

● 1979/02 -	Obtains the type approval of oil content meter FOCAS-1200 from English marine association, DOT.
/03 -	Develops the detector type 38 for ships.
/04 -	Develops supersonic wave surface switch LIS-20.
/06 -	Obtains patent of the electrostatic capacity type level detector electrode.
/09 -	successes developing supersonic wave level meter LIU-300. Starts releasing.

● 1980/04 -	Develops multi-points level switch for sewage CT-3 model.
/07 -	Develops salt content meter for water creator LID-3.
/12 -	Obtains the explosion-proof license of the electrostatic capacity type LIC-50B series from National Institute of Industrial Safety, Ministry of Labor.

● 1981/01 -	Develops the electrostatic capacity type level meter LIC-150 .
/10 -	Obtains the type approval of oily-water content meter for ships FOCAS-1500 and FOCAS-1200 from USSR.

● 1982/01 -	Obtains the type approval of FOCAS-1500A from USA(USCG), English (DOT).
/03 -	Obtains the type approval of FOCAS-1500A from Norway, Sweden, and Japan (HK).
-	Obtains the type approval of FOCAS-1500A from Dutch.
/07 -	The electrostatic capacity type level switch LIC-55,LIC-48,and LIC-46 obtains the certificate of the Lloyd's shippig organization.
	Obtains the type approval of FOCAS-1500A from Greek.

● 1983/01 -	Obtains the type approval of FOCAS-1500A from Panama.
/08 -	Obtains a patent of level detector with electric timer for liquid.
-	Obtains the type approval of FOCAS-1500A Denmark.

● 1984/01 -	Obtains a patent of the electrostatic capacity type level detector.
-	Obtains the type approval of FOCAS-1500A from Belgium.
/06 -	Obtains the type approval of FOCAS-1500A and 1200 from Ministry of Transport, Japan.
/07 -	Develops multi-points level switch for sewage CT-2/3.

● 1985/01 -	Obtains type approval of oil content meter for ships FOCAS-1500A from China (ZC).
/10 -	Develops the electrostatic capacity type level meter LIC-155,and 2-line type level meter.
/12 -	Makes FELLOW KEISOKU Ltd, a subsidiary

● 1986/03 -	Obtains a patent of oil content meter.
/05 -	Successes developing of microwave level switch LIM-10. Starts releasing.
/07 -	Establishes Saitama factory.
/09 -	Successes developing bulk materials flow detector LIM-60. Starts releasing.
/10 -	Successes developing of microwave level switch LIM-20. Starts releasing.

● 1987/04 -	Obtains a patent of the solenoid combination distance meter .

● 1989/05 -	Develops corrosion resistance level switch ES type with ORGANO. Starts releasing.

● 1991/08 -	Obtains a patent of supersonic wave transmitter and receiver..
/12 -	Obtains the type approval of oil content meter FOCAS-1500B and 1500A from USA (USCG).

● 1992/03 -	Obtains a utility model of tank detector .
/05 -	Develops level meter LIP-200.

● 1994/04 -	Obtains the type approval of oil content meter FOCAS-1500C from Japan Administration (JG), English (MSA).
/06 -	Obtains the type approval of oil content meter FOCAS-1500C from Canada Administration.
/11 -	Obtains the type approval of oil content meter FOCAS-1500C from China (ZC).

● 1995/03 -	Continuously obtains the type approval of oil content meter FOCAS-1500C and 1500E from USA (USCG).

● 1996/05 -	Obtains a utility model of signal discriminator.
/11 -	Moves headquarter to 6-13-6 Nishinippori Arakawa-ku, Tokyo. Tokyo Factory to 6-13-9 Nishinippori Arakawa-ku, Tokyo.

● 1997/00 -	Develops supersonic level meter LIC-320 (digital control type).
-	To modularize bulk materials flow detector and renewal are completed .

● 1998/03 -	Releases the electrostatic capacity type level meter LIC-120 (digital control system) and 152 (digital control ).
-	Develops ultrasonic flow meter LIS-3000

● 1999/04 -	Successes developing supersonic flow meter FIS-2000.
-	Successes developing supersonic flow meter FIS-210.
-	Successes developing supersonic flow velocity meter FIS-210.
-	Obtains commendation of superior juridical from Arakawa Tax Office.

● 2000/05 -	Successes developing supersonic wave surface level meter LIU-320 US-64.
-	Starts releasing bulk level level meter (high frequency system).
-	Develops supersonic wave level meter LIU-40 (Simple meter series).

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