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GREENSPAN DONALD J

Overview
  • Total Patents
    28
About

GREENSPAN DONALD J has a total of 28 patent applications. Its first patent ever was published in 1970. It filed its patents most often in United States, Germany and Japan. Its main competitors in its focus markets machines, chemical engineering and mechanical elements are QUALIGEN INC, BOEHRINGER INGELHEIM MICROPARTS GMBH and MYCROLAB DIAGNOSTICS PTY LTD.

Patent filings in countries

World map showing GREENSPAN DONALD Js patent filings in countries
# Country Total Patents
#1 United States 13
#2 Germany 5
#3 Japan 5
#4 Canada 4
#5 France 1

Patent filings per year

Chart showing GREENSPAN DONALD Js patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Greenspan Donald J 21
#2 Donarudo Jiei Guriinsupan 5
#3 J Greenspan Donald 1

Latest patents

Publication Filing date Title
US4530447A Dispenser
US4429800A Child safe container-closure unit
US4459059A Sliding cap with frictional engagement
CA1205053A Dispenser
US4454962A Insertable dispenser
FR2486676A1 METHOD AND APPARATUS FOR DROP FLOW RATE CONTROL
US4392807A Apparatus for closing tubes
US4375825A Integral valve apparatus
US4409988A Apparatus for collecting cultures
US4219525A Method and apparatus for closing tubes
US4202769A Method for separating serum or plasma from the formed elements of blood
US4209485A Method of making a valve apparatus
CA1087573A Valve apparatus and method of making same
CA1103876A Method and apparatus for closing tubes
US4247589A Decorative oxidation process and article
US4189385A Method and apparatus for separating serum or plasma from the formed elements of the blood
US3862525A Medical office facility with two or more examining rooms having a common equipment core area