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GB600877A
|
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Improvements in and relating to calculating apparatus
|
|
GB599324A
|
|
Improved scale-reading arrangement for machine tools
|
|
GB596271A
|
|
Improvements in and relating to spirit levels
|
|
GB593213A
|
|
Improvements in and relating to instruments for obtaining access to and viewing cavities, particularly cavities of the human body
|
|
GB588595A
|
|
Improved optical precision gauge
|
|
GB588850A
|
|
Improved apparatus for grooving cylindrical surfaces
|
|
GB583012A
|
|
Improvements in magnetic compasses
|
|
GB574750A
|
|
Improved optical magnifier
|
|
GB574295A
|
|
Improvements in scale-reading means for angle measuring instruments or devices
|
|
GB551055A
|
|
Improved apparatus for reading or checking the accuracy of linear and circular scales
|
|
GB448647A
|
|
Improvements in magnetometers
|
|
US2073206A
|
|
Torsion meter
|
|
GB427986A
|
|
Improved torsion meter
|
|
GB352698A
|
|
Improvements in or relating to levels
|
|
GB336609A
|
|
The use of a spirit level bubble for control of apparatus and/or mechanism
|
|
GB212209A
|
|
Improvements in or relating to spirit levels
|
|
US1578786A
|
|
Spirit level
|
|
GB216395A
|
|
Improvements in fine adjustment mechanisms applicable to scientific instruments, surveying instruments and the like
|
|
GB207871A
|
|
Improvements in or relating to spirit levels
|
|
GB172213A
|
|
Improvements in or relating to adjusting devices for scientific instruments
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