74553136
Jul 25, 1994
Oct 8, 1996
liquid polymeric materials used for forming photosensitive films; process chemicals used in the manufacture of printed circuit boards and photochemical machinery; and chemicals for treating solutions of spent said process chemicals, all used in the printed circuit board and photochemical machining industries
Chemicalsmachines for treating solutions of spent process chemicals; machines for removing cover sheets from photosensitive materials; machines for photosensitive materials processing; machines for developing, applying, drying and curing liquid photosensitive materials
Machineryelectronic controllers for replenishing chemical solutions in chemical processes for use in the printed circuit board and photochemical machining industries
Electrical and Scientific Apparatus