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IPC Subclass - F17D
|IPC Group||U.S. Class/Subclass||Subclass Images|
|1 / 00||137/599.03||Image 1|
|1 / 20||137/601.18||Image 1|
|3 / 00||137/15.01||Image 1, 2, 3|
|5 / 02||137/15.11||Image 1, 2|
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