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Patents
Typewriting Machines Patents
With Control Of "carbon Paper" For Typing Plural Simultaneous Copies By Single Impression (e.g., On "manifold Set") Patents
By Use Of Other Than Rectangular Sheet Carbon Paper (e.g., Disc, Etc.) Patents
Endless-band Carbon Paper Patents (Class 400/504)
Endless-band Carbon Paper Patents (Class 400/504)
There are no patents to show for this class.