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RITZERFELD GERHARD

Overview
  • Total Patents
    925
About

RITZERFELD GERHARD has a total of 925 patent applications. Its first patent ever was published in 1939. It filed its patents most often in Germany, Switzerland and United Kingdom. Its main competitors in its focus markets textiles and paper, optics and computer technology are BLOCK & ANDERSON LTD, LAMM AB CARL and BLOCK & ANDERSON LIMITED.

Patent filings in countries

World map showing RITZERFELD GERHARDs patent filings in countries
# Country Total Patents
#1 Germany 156
#2 Switzerland 141
#3 United Kingdom 138
#4 France 93
#5 Sweden 92
#6 Austria 62
#7 Spain 59
#8 United States 53
#9 Canada 32
#10 Netherlands 23
#11 Denmark 19
#12 Belgium 18
#13 Italy 17
#14 Norway 12
#15 Japan 10

Patent filings per year

Chart showing RITZERFELD GERHARDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Ritzerfeld Gerhard 341
#2 Ritzerfeld G 91
#3 Gerhard Ritzerfeld 88
#4 Wilhelm Ritzerfeld 23
#5 Ritzerfeld Wilhelm 13
#6 Ritzerfeld W 7
#7 Geruhaado Ritsutsuaafuerudo 6
#8 Geruharuto Ritsutsuaafueruto 4
#9 Guenter Mache 3
#10 Mache Guenter 2

Latest patents

Publication Filing date Title
ES467305A1 A device for the feeding of papers in the form of leaves (Machine-translation by Google Translate, not legally binding)
ES467188A1 One electrostatic copiador a xerographic. (Machine-translation by Google Translate, not legally binding)
US4129073A Duplicator machine with means for applying to the copies different markings
ES456865A1 A rotary multicopista (Machine-translation by Google Translate, not legally binding)
GB1519117A Rotary duplicator for linewise or sectionswise or whole-side copyng of a printing master
DE2701476A1 THERMAL COPIER
DE2656570A1 Daylight projector with fresnel lens and working plate - has housing containing projection lamp and reflector consisting of hollow mirror underneath lamp
GB1514115A Photocopying apparatus
GB1514605A Reprographic apparatus
CH608635A5 Electrostatic duplicator
CH608636A5 Electrostatic copier
DE2628516A1 ELECTROSTATIC OR XEROGRAPHIC COPYING OR MULTIPLIER
DE2618658A1 ROTATION MULTIPLE FOR LINE OR SECTIONS AND FULL PAGE PRINT
CH610242A5 Thermal copying device
US4068948A Copying apparatus
DE2606707A1 Document thermal copying machine - has separate feelers for leading edges of document and copy sheet sets
JPS5237437A Electrostatic duplicator or dry duplicator
GB1483300A Projectors
US3995546A Rotary duplicating machine
GB1488288A Electrostatic or xerographic copying or duplicating apparatus