|
GB581189A
|
|
Improvements in or relating to telephone receivers
|
|
GB523931A
|
|
An adaptor for electric dry batteries
|
|
GB495171A
|
|
Improvements in deaf-aids for use in cinema auditoriums or the like
|
|
GB503875A
|
|
Improvements in electric dry batteries
|
|
GB482550A
|
|
Improvements in casings for electric batteries
|
|
GB465689A
|
|
Improvements in electric batteries and connectors therefor
|
|
GB456387A
|
|
Improvements relating to instruments for applying medicaments to the ear or other passages of the body
|
|
GB440084A
|
|
Improvements in apparatus for teaching lip reading
|
|
GB376986A
|
|
Improvements relating to telephonic appliances
|
|
GB311835A
|
|
Improvements relating to sound reproducing apparatus
|
|
GB259298A
|
|
Improvements in loud speakers
|
