Patent US-1902-712689

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Concentrates airflow from propeller by encasing it in an open cylinder

Inventor location (imputed by HistPat): Teplitz, Austria-Hungary ; King county, WA (FIPSloc=53033)

Related to: DE18860 (1899), GA24047 (1899), & other applications

To do: Check spreadsheet for the number 390 -- what field should that go in?

Diagrams are more elaborate than European versions filed earlier. However, clearly part of the same family, as Krocker declares at the beginning of the application. In addition to the versions we know about already (June 2020) he mentions applications in:

  • Sweden, dated December 4, 1899; and
  • Belgium dated December 9, 1899.

Patent family descending from Patent DE-1899-123884


Year filed 1900
Year granted 1902
Office US
Patent number 712689
Inventors Rudolf Krocker
Inventor country
Applicant person Ernst Rudolph Krocker
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Air ship or vessel
English title Air ship or vessel
Tech fields propulsion, LTA, propeller
Filing date 1900-01-04
Full specification filed date
Application number 1900000390
Grant date 1902-11-04
Granted? 1
Publication date
Supplementary to patent Patent DE-1899-123884
Related to aircraft? 1
Serial number
Patent agent
Assigned to
National tech categories USPC 244/73R
IPCs IPC B64C11/001
CPCs CPC B64C11/001
Family year 1900
First filing? 1
Cites these patents
Citations from after 1930
Application ID 46779049
INPADOC family ID 43593923
Number of text pages
Number of diagram pages
Number of figures
Number of claims