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R.D. Gray (Patentee) 
Portable Photographic Camera (US Patent No. US346199A) - Sheet 2 of 2 
1886, 27 July (application granted / publication) 
  
Patent illustration 
US Patent Office 
 
LL/113566 
  
My invention relates to that class of portable photographic cameras which are designed to be carried upon the person, and has for its object to supply a camera which shall be wholly concealed under the clothing, and yet admit of being readily brought into proper focus for obtaining the image of an object or person. To this end I have constructed a camera, as hereinafter described, to be worn as a vest, concealed under the outer garments, the lens being brought to the center of the chest to facilitate directing it toward an object, and made to subserve the secondary purpose of a stud or button for the outer vest and coat, and thereby pass unobserved as a lens. 
 

 
  
 
  
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