|
US2781985A
|
|
Bobbin
|
|
US2741296A
|
|
Apparatus for heat-sealing overlapping surfaces of plastic material
|
|
US2721267A
|
|
Electronic temperature indicator
|
|
US2595421A
|
|
Plastic-sealing machine
|
|
US2591383A
|
|
Plastic-sealing element
|
|
US2556452A
|
|
Apparatus for sealing plastics
|
|
US2589777A
|
|
Plastic-sealing apparatus
|
|
US2556008A
|
|
Plastic-sealing apparatus
|
|
US2528722A
|
|
Power-distribution system
|
|
US2552259A
|
|
Electrical heating element
|
|
US2512828A
|
|
Speaker's stand
|
|
US2581977A
|
|
Apparatus for sealing plastics
|
|
US2461372A
|
|
Tube forming device
|
|
US2458563A
|
|
Tube-forming device
|
|
US2570921A
|
|
Electronic heating of materials
|
|
US2519982A
|
|
Tube-squaring attachment
|
|
US2490416A
|
|
Apparatus for forming closed-end tubes
|
|
US2484076A
|
|
Tube forming device
|
|
US2452357A
|
|
Manufacture of plastic containers
|
|
US2484075A
|
|
Tube-forming apparatus
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