138 



THE WORLD'S ADVANCE for JULY 



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PATENTS 



C. L. PARKER 



Formerly Member Ex- 

 amining Corps, U. S. 



Patent Office. . ."* 

 PATENT LAWYER 



12 McGill Bldg., 

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Patents, Trade Marks, Copyrights, Patent Litigation 



Handbook for Inventors, "Protecting, Exploiting 

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shows hundreds of practical how-to-make 



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ordinary household tools. 



YOUR IDEAS 



for certain inventions. Book "How to 

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 sent free. Send rough sketch for free report as 

 I to patentability. Patents advertised for eale at our 

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IHELP 



INVENTORS 



SUCCEED 



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Protecting Patents 



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CARL H. CRAWFORD 



fillJenifer Bldg., Washington, D. C. 



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