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US909719A
|
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Apparatus for chamfering gear-teeth.
|
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CA101004A
|
|
Plate printing machine
|
|
US962439A
|
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Engraving-machine.
|
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US847165A
|
|
Bulkhead-door, hatch, or other barrier.
|
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US956807A
|
|
Plate-printing machine.
|
|
US871804A
|
|
Apparatus for electrically operating water-tight bulkhead-doors.
|
|
US775768A
|
|
Apparatus for operating armored hatches, trap-doors, or the like.
|
|
US810915A
|
|
Automatic cut-out mechanism for electrically-operated bulkhead-doors.
|
|
US833125A
|
|
Electric system for operating bulkhead doors, hatches, &c.
|
|
US721024A
|
|
Bulkhead-door.
|
|
US695378A
|
|
Check-valve.
|
|
US681626A
|
|
Pneumatic indicator system.
|
|
US681625A
|
|
Autopneumatic regulator for motors.
|
|
US681624A
|
|
Mechanism for moving armored hatches, &c.
|
|
US631698A
|
|
Hydraulic system for closing buklhead-doors.
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