Manual of classification of subjects of invention of the United States Patent office Rev. to January 1, 1920 (including classification bulletin no. 43)
Corporate Author: | |
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Format: | Book |
Language: | English |
Published: |
Washington :
Govt. print. off.,
1920
Washington, Govt. Print. Off., 1920 Washington, 1920 |
Subjects: |
Internet
University of Chicago
Call Number: |
T223.F5 1920 |
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Cornell University
Call Number: |
arX5549 |
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Princeton University
Call Number: |
T223.F4 U573 1920 |
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Columbia University
Call Number: |
608 Un3202 |
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