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HEIL OSKAR

Overview
  • Total Patents
    38
About

HEIL OSKAR has a total of 38 patent applications. Its first patent ever was published in 1932. It filed its patents most often in Germany, United Kingdom and Canada. Its main competitors in its focus markets audio-visual technology, electrical machinery and energy and basic communication technologies are QUAM NICHOLS COMPANY, KLEIN SIEGFRIED and YAMAHA METANIX CORP.

Patent filings in countries

World map showing HEIL OSKARs patent filings in countries

Patent filings per year

Chart showing HEIL OSKARs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Heil Oskar 17
#2 Oskar Heil 2
#3 Osukaa Hairu 2
#4 Heil Oskar Dr 1

Latest patents

Publication Filing date Title
US4160883A Acoustic transducer and method of making same
DE2757697A1 Loudspeaker with multiple longitudinally aligned sections - each contg. transverse membrane and angled sound reflecting wall
DE2649771A1 SPEAKER
US4056697A Movable diaphragm connector method flexible hinge diaphragm surround and electro-acoustic transducer with folded diaphragm with intermediate flexible portions
US4107479A Electro-acoustic transducer
US4039044A Low frequency electro-acoustic transducer with interconnected diaphragms interleaved with fixed diaphragms
CA1067201A Low frequency electro-acoustic transducer
CA979113A Electro-acoustic transducer
GB685846A Electron gun and amplifier employing the same
GB439457A Improvements in or relating to electrical amplifiers and other control arrangements and devices
GB420753A Improvements in and relating to electron discharge tubes for the production or amplification of short waves
GB420681A Improvements in and relating to electron discharge tubes, for generating and receiving ultra-short waves
GB420802A Improved device for the production or amplification of ultra short waves
CA903878A Acoustic transducer
CA362916A Short wave producing apparatus
CA487522A Electron gun and amplifier employing the same