|
GB289719A
|
|
Improvements in or relating to telephonic ear-pieces
|
|
GB286185A
|
|
Improvements in or relating to telephone head-piece receivers
|
|
US1668509A
|
|
Sound-reproducing device
|
|
US1587643A
|
|
Ear-loop attachment for deaf phones
|
|
US1563501A
|
|
Telephone receiver
|
|
US1647182A
|
|
Telephone receiver
|
|
US1563500A
|
|
Loud-speaking receiver unit
|
|
US1621845A
|
|
Loud-speaking telephone receiver
|
|
GB201403A
|
|
Improvements in telephone and like head instruments
|
|
GB207485A
|
|
Improvements in machines for winding electric coils
|
|
GB206203A
|
|
Improvements in machines for winding electric coils
|
|
GB202818A
|
|
Improvements in telephone receivers
|
|
US1548325A
|
|
Telephone receiver
|
|
US1501670A
|
|
Winding machine
|
|
US1577910A
|
|
Headband
|
|
US1577911A
|
|
Loud speaker for vehicles
|
|
GB197029A
|
|
Sectional switchboard frame
|
|
GB194886A
|
|
Battery carrier and container
|
|
GB195817A
|
|
Telephone signal device
|
|
GB197028A
|
|
Signal systems for telephones
|
