covers patents 3,552,131 to 3,781,778 and reissued patents Re. 27,090 to 

 Re. 27,640, issued during 1971 to 1973. Volume III includes patents 

 3,782,127 to 3,999,566 and reissued patents Re. 28,232 to Re. 28,989, 

 issued from 1974 to 1976. Example annotations are presented for original 

 patents in Figures 4, 5, and 6, and for reissued patents in Figures 7 and 

 8. Figure 4 is a page from Volume I containing annotations for patents 

 issued on November 5 and 12, 1968. Figures 5 and 6 are pages from Volume 

 II of the appendix with annotations from the dates shown in the figures. 

 Figures 7 and 8 are pages from Volume III of the appendix containing 

 annotations for reissued patents, including reissued versions of two of 

 the original patents described in Figures 5 and 6. 



As illustrated, annotations for new patents are listed in numerical 

 order, grouped by the weekly date of issue. Each annotation includes 

 information identifying the patent and inventor, classifying the patent, 

 and briefly describing the invention. The patent number, the title, and 

 information on the inventor, assignee, patent application, classification, 

 and number of claims were copied directly from the Offic-ldl Gazette, un- 

 less obvious spelling errors made the title confusing, or a "Certificate 

 of Correction" with the patent document indicated that printing errors 

 in the inventor's name needed to be corrected. As can be seen by compar- 

 ing Figures 4 and 5, the format changes slightly between 1968 and 1969. 

 Before 1969 the "original U.S. classification" is printed in parentheses 

 after the abbreviation "CI." For 1969 and the following years the paren- 

 theses are deleted, the abbreviation "U.S. CI." is used, and all the 

 assigned international classifications are listed after "Int. CI." 

 "Cross-reference U.S. classifications," listed after the abbreviation 

 "U.S. CI. X.R. ," are added to the annotations for those patents assigned 

 them from December 10, 1968, onward. All classification codes are those 

 assigned to the patents at the time of issue and do not reflect changes 

 caused by revisions in the classification system. 



The description of the invention includes the abstract or, if the 

 patent had no abstract, a representative claim with the claim number, 

 copied from the Official Gazette or patent with no corrections of printing 

 errors. The annotation at the top in Figure 4 illustrates the use of a 

 claim. In addition, for those patents containing figures, a figure copied 

 from the Official Gazette is included. As shown in the annotation at the 

 top of Figure 4, if the patent contains no figures the fact is noted in 

 the annotation. Another item in the annotation is the keywords assigned 

 to each patent for this bibliography. If the patent was reissued before 

 the end of 1976, a reference to the reissued patent number also is in- 

 cluded in the annotation, as illustrated by the annotations at the top 

 of Figure 5 and at the bottom of Figure 6. 



Annotations for reissued patents are listed after the original patents 

 in Volumes II and III. No reissued patents were chosen for the collection 

 from the period covered by Volume I. Due to the small number of reissued 

 patents, the date of reissue for each is given in the annotation, along 

 with information on the original patent and on the application for reissue. 

 If the original patent had an abstract, the entire text of the abstract is 



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