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1. Patents. [Manual of classification of patents, 1923] [substitute pages containing corrections].

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1929.]
SuDoc number:: I 23.2:C 56/4/923-p.165-166b

2. Patents. [Manual of classification of patents, 1923] errata and minor correction sheet, Jan. 1-Dec. 31, 1928.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1929.]
SuDoc number:: I 23.2:C 56/4/923-errata 8

3. Patents. [Manual of classification of patents, 1923] errata and minor correction sheet, July 1-Dec. 31, 1927.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1928.]
SuDoc number:: I 23.2:C 56/4/923-errata 7

4. Patents. [Manual of classification of patents, 1923, substitute pages containing corrections.]

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1927.]
SuDoc number:: I 23.2:C 56/4/923-p.183-184b

5. Patents. [Manual of classification of patents, 1923, substitute pages containing corrections.]

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1927.]
SuDoc number:: I 23.2:C 56/4/923-p.45-170

6. Patents. [Manual of classification of patents, 1923] errata and minor correction sheet, Jan. 1-June 30, 1927.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1927.]
SuDoc number:: I 23.2:C 56/4/923-errata6

7. Patents. [Manual of classification of patents, 1923] errata and minor correction sheet, July 1-Dec. 31, 1926.

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: 1927
SuDoc number:: I 23.2:C 56/4/923-errata 5

8. Patents.Manual of classification of patents, 1923, [substitute pages containing corrections].

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: [1927.]
SuDoc number:: I 23.2:C 56/4/923-p.235-235 a

9. Patents. [Manual of classification of patents, 1923, substitute pages containing correcticus.]

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: 1926
SuDoc number:: I 23.2:C 56/4/923-p.209-212

10. Patents. [Manual of classification of patents, 1923, substitute pages containing corrections.]

Corporate/Agency Authors:: Patent Office and Commerce Department
Publisher:: Patent Office
Date:: 1926
SuDoc number:: I 23.2:C 56/4/923-p.61-62a

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