Objects

Objects
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Image Not Available
Documentary
Harry Le B. Gray
Patent- Process of Making Acetylating Mixtures
1931/12/15
1998.0334.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Process of Making Cellulose Acetate
1931/09/15
1998.0333.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Method for increasing the uniformity of cellulose esters
5/7/1929
1998.0332.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Process for making cellulose esters of high uniformity
5/7/1929
1998.0331.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Photographic Film Cartridge
05/15/1917
1998.0327.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Photographic Camera or Holder
1916/07/25
1998.0326.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Photographic Film Cartridge
1908/01/07
1998.0325.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Photographic Film Cartridge
1906/05/15
1998.0324.0001
Image Not Available
Documentary
Harry Le B. Gray
Patent- Photographic Film Cartridge
1905:12/19
1998.0323.0001
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