Learn more

LEEDS & NORTHRUP CO

Overview
  • Total Patents
    1,242
About

LEEDS & NORTHRUP CO has a total of 1,242 patent applications. Its first patent ever was published in 1903. It filed its patents most often in United States, United Kingdom and Canada. Its main competitors in its focus markets measurement, control and machines are ATMOS FRITZSCHING & CO GMBH, HARTMANN & BRAUN AG and PERKIN ELMER LTD.

Patent filings in countries

World map showing LEEDS & NORTHRUP COs patent filings in countries

Patent filings per year

Chart showing LEEDS & NORTHRUP COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Williams Jr Albert J 47
#2 Ross Charles W 28
#3 Davis Elwood T 26
#4 Bristol Edward S 21
#5 Ross Raymond W 21
#6 Hance Richard J 19
#7 Eckfeldt Edgar L 16
#8 Schwartzenberg John W 16
#9 Blum Bernard 15
#10 Polster Norman E 15

Latest patents

Publication Filing date Title
US4545029A Remote correlation of sequence of events
JPS58139060A High-speed sensible oxygen cell
US4429343A Humidity sensing element
US4469717A Thin film resistance thermometer with a predetermined temperature coefficient of resistance and its method of manufacture
US4473889A Remote correlation of sequence of events
US4492948A Fast response surface contact temperature sensor
US4390925A Multiple-cavity variable capacitance pressure transducer
US4419733A Time deviation and inadvertent interchange correction for automatic generation control
US4390796A Voltage to duty cycle converter
US4389674A Preamplifier for low voltage signals in the presence of high voltage noise
US4417303A Multi-processor data communication bus structure
IE810312L Preamplifier for voltage measuring instrument
US4374351A Digital drive unit regulator
US4385362A Filter arrangement for elimination of unwanted bias in a model reference process control system
US4407013A Self tuning of P-I-D controller by conversion of discrete time model identification parameters
US4368510A Automatic identification system for self tuning process controller
US4375333A Microprocessor directed optical pyrometer
US4333352A Injection-molded Doppler flowmeter transducer assembly
US4337434A Compensator for slowly responding sensors
US4274284A Expandable phase change detector device