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ERMA OPTICAL WORKS

Overview
  • Total Patents
    13
About

ERMA OPTICAL WORKS has a total of 13 patent applications. Its first patent ever was published in 1981. It filed its patents most often in United States, Germany and EPO (European Patent Office). Its main competitors in its focus markets measurement, chemical engineering and machines are WYATT TECHNOLOGY EUROP GMBH, GENETIC MICRODEVICES LTD and MAYEAUX HOLDING LLC.

Patent filings in countries

World map showing ERMA OPTICAL WORKSs patent filings in countries
# Country Total Patents
#1 United States 4
#2 Germany 2
#3 EPO (European Patent Office) 2
#4 France 2
#5 United Kingdom 2
#6 Canada 1

Patent filings per year

Chart showing ERMA OPTICAL WORKSs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Measurement
#2 Chemical engineering
#3 Machines

Top inventors

# Name Total Patents
#1 Shirato Kozo 11
#2 Kawashima Kazuyasu 10
#3 Hiraizumi Kazuo 6
#4 Sato Yoshihiro 5
#5 Koyama Yasuo 2
#6 Tanaka Minoru 2
#7 Takeya Akira 2
#8 Yamamoto Yoshio 2
#9 Okuyama Shinya 2
#10 Shinohara Satoshi 2

Latest patents

Publication Filing date Title
US4629561A Liquid chromatograph with flow controller
US4680552A Apparatus for measuring impurities in super-pure water without exposure to surrounding atmosphere
US4651087A Apparatus for measuring impurities in ultrapure water
US4469495A Method and device for degassifying liquid
FR2504819A1 Degassing liquids - by locating the liquid in plastics container subjected to external vacuum
DE3116672A1 Process and apparatus for degassing liquids containing gases dissolved therein
GB2097281A Degassing liquids