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DRAY ROBERT F

Overview
  • Total Patents
    31
About

DRAY ROBERT F has a total of 31 patent applications. Its first patent ever was published in 1982. It filed its patents most often in United States, EPO (European Patent Office) and WIPO (World Intellectual Property Organization). Its main competitors in its focus markets machines are NI K I RAZRABOTKE MASHIN OBORU, UK NI K I RAZRABOTKE MASHIN OB and CINCINNATI MILACRON AUSTRIA.

Patent filings per year

Chart showing DRAY ROBERT Fs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Machines

Top inventors

# Name Total Patents
#1 Dray Robert F 31
#2 Bennett Bryan C 1

Latest patents

Publication Filing date Title
CA2392148A1 Shut-off nozzle
WO0168344A1 Dual-cylinder injection molding apparatus
EP1084356A2 Sliding ring non-return valve
WO9719800A1 Injection molding method and device
US5258158A Positive-type non-return valve and method of using valve
US5151282A Positive-type non-return valve
US5071255A Apparatus for varying pressure within a screw channel
US4896969A Method and apparatus for melting and conveying plasticated material
US4842414A Mixing device for a feed screw
US4723847A Apparatus for varying pressure within a screw channel
GB8630021D0 Method and apparatus for melting and conveying plasticated material
DE3404461A1 Device and process for melting and conveying plasticated material
US4444507A Apparatus and method for melting and conveying plasticated material