US930416A
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Registration regulation for time-recorders.
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US958148A
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Synchronizing attachment for clocks.
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US954714A
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Synchronizing attachment for clocks.
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US898508A
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Workman's time-controller.
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US930357A
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Time-recording mechanism.
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US956309A
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Time-recorder.
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US908975A
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Time-recorder.
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US850526A
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Automatic card-stop for time-recorders.
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US908974A
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Workman's time-recorder.
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CA98000A
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Time recorder
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US908973A
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Time-recorder.
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US908972A
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Time-recorder.
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US848294A
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Ribbon mechanism for time-recorders, &c.
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CA97799A
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Time register
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US888069A
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Means for detecting false registration in time-recorders.
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US908971A
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Time-registering clock.
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