public kk traded as tyo 6849 industry medical equipment founded tokyo august 7 1951 ; 65 years ago 1951 08 07 founder yoshio ogino headquarters nishiochiai shinjuku ku tokyo 161 8560 japan key people fumio suzuki chairman and ceo hirokazu ogino president and coo products physiological measuring equipment diagnostic information systems revenue jpy 160.8 billion fy 2014 us 1.35 billion fy 2014 net income jpy 11.1 billion fy 2014 us 92.5 million fy 2014 number of employees 4 616 as of march 31 2015 website official website footnotes references 1 2 nihon kohden corporation nihon k denk gy kabushiki gaisha is a tokyo based leading manufacturer developer and distributor of medical electronic equipment which include eegs emg measuring systems ecgs patient monitors and clinical information systems 2 with subsidiaries in the u.s. europe and asia . the company s products are now used in more than 120 countries and it is the largest supplier of eeg products worldwide . 3 in 1972 takuo aoyagi a researcher at the company invented and patented the basic principles of pulse oximetry . 4 two years later he developed the world s first pulse oximeter which has helped improve patient safety during anaesthesia . 5 references edit key facts . nihon kohden . retrieved september 9 2015 . a b company snapshot . bloomberg l.p. retrieved september 9 2015 . nihon kohden secures neurodiagnostic contract with novation . mhealth news . himss . august 19 2015 . retrieved september 9 2015 . edmond i eger ii ; lawrence saidman ; rod westhorpe september 14 2013 . the wondrous story of anesthesia . springer science business media . p. 412 . isbn 978 1 4614 8441 7 . nihon kohden s dr takuo aoyagi receives 2015 ieee medal for innovations in healthcare technology . thefinancialexpress.com . indian express limited . september 8 2015 . retrieved september 9 2015 . external links edit wikimedia commons has media related to nihon kohden . official website english japan portal medicine portal companies portal retrieved from https en.wikipedia.org w index.php title nihon kohden & oldid 733249375 categories health care companies of japancompanies based in tokyocompanies listed on the tokyo stock exchangecompanies established in 19511951 establishments in japanjapanese brandshidden categories use mdy dates from august 2015pages using infobox company with unsupported parametersarticles containing japanese language textcommons category with local link same as on wikidata navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version in other projects wikimedia commons languages edit links this page was last modified on 6 august 2016 at 13 18 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view