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US5923032A
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Interaligned component optical encoder with integral housing component locating studs and shelf
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US5577447A
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Automatiac railway fastener remover
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US5546864A
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Rail anchor remover
|
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US5398616A
|
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Automatic rail fastener applicator
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US5253844A
|
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Hairpin spike pulling tool and machine therefor
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US5191840A
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Spike driving machine having pushing and percussive spike driving functions
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US5038914A
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Automatic tie plate sorting conveyor
|
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US4825919A
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Railroad adzer debris removal means
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US4974518A
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Automatic tie plate setting machine
|
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US4907686A
|
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Automatic high speed tie plate reorienting mechanism
|
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US4909375A
|
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Automatic tie plate sorting conveyor
|
|
US4942822A
|
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Method and apparatus for automatically setting rail tie plates
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US4780578A
|
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Anerobic sealed rotary switch
|
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US4792376A
|
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Apparatus for the sublimation printing of keyboard caps
|
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US4777885A
|
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Spike driving machine including locking strut for spike driver gun
|
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US4688247A
|
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Pay TV scrambling by audio encryption
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US4633309A
|
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Cable television master/slave decoder control
|
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US4709266A
|
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Satellite scrambling communication network using geographically separated uplinks
|
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US4652924A
|
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RF volume control circuit
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US4531021A
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Two level encripting of RF signals
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