|
US1911142A
|
|
Apparatus for correcting tilted photographs
|
|
US1910425A
|
|
Method of making maps
|
|
GB254301A
|
|
Improvement in method for the conversion of conical projections to orthographic projections
|
|
US1649406A
|
|
Resultant-tilt finder
|
|
US1633253A
|
|
Projection tracing table
|
|
US1612800A
|
|
Method for the conversion of conical projections to orthographic projections
|
|
GB245942A
|
|
Improvements in or relating to cameras for aerial photography
|
|
GB234052A
|
|
Improvement in or relating to measuring stereoscopes
|
|
GB229276A
|
|
Improvements in or relating to methods of making maps
|
|
US1756062A
|
|
Measuring stereoscope
|
|
US1565413A
|
|
Method of making maps
|
|
US1558272A
|
|
Aeroplane camera
|
