Haseltine, Lake & Waters
Light and heat writing pen for photosensitive material
 A writing pen for heat developing photoconductive material including a pen having a nib formed of material of high thermal conductivity and pervious to light, for contacting photosensitive heat developing material. The pen has a light source for illuminating the photosensitive material through the pen nib contacting the material, and a heater embedded in the nib for heating the nib portion in contact with photosensitive material. The pen nib may include a light-pervious rotatable ball tip seated in a light-pervious ball receptacle. 
Olympus Optical Company Limited
B B B B B B
B43K B43K B29C B29C B29C B29C
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Tetsuo Hiromi
Fujie Ito