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ZENG STANDARD COMPANY DE

Overview
  • Total Patents
    18
About

ZENG STANDARD COMPANY DE has a total of 18 patent applications. Its first patent ever was published in 1906. It filed its patents most often in United States. Its main competitors in its focus markets medical technology, control and machine tools are MCINTYRE KEVIN M, RAGAUSKAS ARMINAS and APPLIED SPINE TECHNOLOGIES INC.

Patent filings in countries

World map showing ZENG STANDARD COMPANY DEs patent filings in countries
# Country Total Patents
#1 United States 18

Patent filings per year

Chart showing ZENG STANDARD COMPANY DEs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Medical technology
#2 Control
#3 Machine tools

Top inventors

# Name Total Patents
#1 De Zeng Henry L 14
#2 Zeng Henry L De 4

Latest patents

Publication Filing date Title
US1638986A Diagnostic instrument
US1635822A Diagnostic instrument
US1698124A Optical diagnostic instrument
US1698013A Projection device
US1570623A Diagnostic instrument
US1587151A Diagnostic instrument
US1618971A Diagnostic instrument
US1618970A Diagnostic instrument
US1559558A Diagnostic instrument
US1559557A Ophthalmoscope
US1608726A Diagnostic instrument
US1611167A Eye-testing instrument
US1589172A Orificial instrument
US1563172A Ophthalmologic instrument
US971026A Schematic eye.
US917021A Illuminator.
US887032A Ophthalmoscope.
US886770A Lens system for measuring the refraction of the eye.