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D & D COMPANY INC

Overview
  • Total Patents
    19
About

D & D COMPANY INC has a total of 19 patent applications. Its first patent ever was published in 1958. It filed its patents most often in Germany, United States and Switzerland. Its main competitors in its focus markets optics are YABE OPTICAL INST MFG CO LTD, DONGGUAN XUYE PHOTOELECTRIC TECHNOLOGY CO LTD and MAEDA SHIGEO.

Patent filings in countries

World map showing D & D COMPANY INCs patent filings in countries
# Country Total Patents
#1 Germany 10
#2 United States 5
#3 Switzerland 2
#4 Austria 1
#5 United Kingdom 1

Patent filings per year

Chart showing D & D COMPANY INCs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Optics

Focus technologies

# Technology
#1 Optical systems

Top inventors

# Name Total Patents
#1 Riccio Lorenzo Del 10
#2 Del Riccio Lorenzo 8
#3 Goldhammer Dipl-Ing Albert 4
#4 Dowling Robert Whittle 4
#5 Whittle Dowling Robert 3
#6 Dowling Robert W 2
#7 Robert Dowling 1

Latest patents

Publication Filing date Title
DE1284116B Filter system for binoculars
DE1547238A1 Focusing system for binocular binoculars
DE1547239A1 Adjustment device for binocular binoculars
DE1241144B Floatable binoculars
DE1210583B Binoculars with protective cover
DE1210205B Eye cup for binoculars
DE1176394B binoculars
DE1222703B Holding device for optical components on compact binoculars
DE1259113B Protective device for eyepiece and lens on compact binoculars
DE1215953B Focusing device for prism double telescopes with double focusing and single focusing to compensate for the ametropia of the observer
US3076382A Lens arrangement for a binocular telescope
US3062098A Lens covers for a binocular telescope
US3076381A Lens casing control mechanism for a binocular telescope
US3015252A Binocular telescope focusing means
US3170024A Binocular telescope with sliding lens casings and central focusing means