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US4069011A
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Envelope opening machine
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US4106432A
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Apparatus for applying chemicals to envelopes
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US4082603A
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Envelope opening process
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US3902429A
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Track guided tray used in a mechanism for opening envelopes
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DE2258471A1
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Chemically opening envelopes and other paper structures - by applying sensitiser and then developing agent to release agent decomposing paper
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GB1415674A
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Opening of paper constructions
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CA945121A
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Process and agents for opening paper constructions
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US3871573A
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Process and agents for opening paper constructions
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US3815325A
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Mechanism for opening envelopes
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US3816213A
|
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Process and agents for opening paper constructions
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CA939595A
|
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Process and agents for opening paper constructions
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US3547265A
|
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Scanning mechanism
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CA890064A
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Scanning mechanism
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