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JOHN SPEIGHT

Overview
  • Total Patents
    17
About

JOHN SPEIGHT has a total of 17 patent applications. Its first patent ever was published in 1934. It filed its patents most often in United Kingdom and Germany. Its main competitors in its focus markets chemical engineering, measurement and machines are TURNER PEIRSON, HENAN KANGXING PHARMACEUTICAL and GUSTAV PLATH.

Patent filings in countries

World map showing JOHN SPEIGHTs patent filings in countries
# Country Total Patents
#1 United Kingdom 16
#2 Germany 1

Patent filings per year

Chart showing JOHN SPEIGHTs patent filings per year from 1900 to 2020

Focus industries

Latest patents

Publication Filing date Title
GB557922A Improvements in centrifugal dressing machines and other rotary sifters primarily for separating flour and meal from cereal products
GB548886A Improvements in or relating to sieves for granular materials
GB550678A Improved means for measuring and indicating temperatures of rotating surfaces
GB552632A Improvements in sieves for granular materials
GB551480A Improvements in or relating to mills for grinding flour and the like
GB548885A Improvements in or relating to sieves for granular materials
GB548882A Improvements in or relating to plansifters
GB548884A Improvements in or relating to sifting apparatus
GB548881A Improvements in or relating to plansifters
GB548887A Improvements in or relating to sieve-cleaning devices
GB548883A Improvements in or relating to plansifters
DE647170C Plansifter
GB468716A Improvements in or relating to dust filters
GB465636A Improvements in or relating to plansifters
GB448010A Improvements relating to plansifters
GB429502A Improvements relating to sieve cleaning brushes
GB435328A Improvements relating to plansifters