|
GB381311A
|
|
Improvements in ships binnacles
|
|
GB358722A
|
|
Improvements in sextants
|
|
GB316438A
|
|
Apparatus for testing the centering of divided arcs of circles
|
|
GB311936A
|
|
Improvements in aneroid barometers
|
|
GB311086A
|
|
Improvements in sextants
|
|
GB278893A
|
|
Improvements in sextants
|
|
GB279243A
|
|
Improvements in sextants
|
|
GB211428A
|
|
Improvements in marine clinometers and similar instruments
|
|
GB220848A
|
|
Improvements in binoculars
|
|
GB184728A
|
|
Improvements in devices for facilitating the reading of sextants and other like instruments
|
|
GB191227755A
|
|
Improvements in Compass Cards.
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