Luminescent backing sheet for writing in the dark

Details Luminescent backing sheet for writing in the dark Luminescent backing sheet for writing in the dark

1976-06-21

1977-07-12

Borchelt, Archie R.

Radiant energy

Luminophor irradiation

Self-luminous article

35 37, 250486, H01J 162

Patent

active

040356523

ABSTRACT:
A lined phosphorescent backing sheet for use in underlying relation with writing paper or drawing sheets permitting a writer to write in orderly form in the dark without need for external light.

REFERENCES:
patent: 1371430 (1921-03-01), Nickerson
patent: 2341583 (1944-02-01), Tuve

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