For issue date
US T857037 I4
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BEST AVAlLABLE COPY DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request or the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 0.0. 1221. identification is by serial number oi. the application and the heading indicates the number or pages of speciflcltiou, including claims, and of sheets or drawing contained in the application as originally filed. The die of this eppllontion is nnllnhle to the public for inspection; reproduction may be purchased (or 30 cents per sheet.
Appliontionl published under the Defensive Publication Program have not been examined as to the merits of aliens! invention. The Potent Oilice mskel no assertion as to the novelty of the disclosed subject mum.
PUBLISHED DECEMBER 24, 1968 535,843 BOOK BACK RIBS Ben'l.l'nrdnelldEdIlnK-MGCIelhn,b0tldP.0.
Box 431 mm Mar. 211mm Dec. 24, ms Clue 161-123 1 Sheet Dram 13 Page:
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