Improvements in temple mounting structure for spectacles
GB675371A
Improvements in or relating to the production of maps and to a method of correcting residual optical distortion in the final image of an object produced by an image forming system
GB594291A
Improvements in or relating to time indicating devices
GB559474A
Improvements in or relating to apparatus for generating precision flat surfaces
GB560651A
Improvements in or relating to apparatus for generating precision cylindrical surfaces
GB558549A
Improvements in or relating to mechanism for generating curved surfaces, particularlyadapted for lens grinding
GB557644A
Improvements in or relating to devices for determining the median value of a group of measurements
GB492569A
Improvements in or relating to ophthalmic mountings
GB509479A
Improvements in or relating to corrective lens systems
GB489251A
Improvements in or relating to methods of and devices for measuring the difference in lengths of lines or portions of a wedge spectrogram
GB487186A
Improvements in or relating to contact lenses
GB478488A
Improvements in or relating to microscopes
GB493366A
Improvements in or relating to methods of and devices for taking an impression of the eye
GB495191A
Improvements in or relating to contact lenses and methods of making the same
GB490149A
Improvements in or relating to photographic cameras with focusing range finders
DE641873C
Device for the production of reflectors with a silver layer deposited on a glass mold with a reinforcing back layer
