PL37499B1 - - Google Patents

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Publication number
PL37499B1
PL37499B1 PL37499A PL3749948A PL37499B1 PL 37499 B1 PL37499 B1 PL 37499B1 PL 37499 A PL37499 A PL 37499A PL 3749948 A PL3749948 A PL 3749948A PL 37499 B1 PL37499 B1 PL 37499B1
Authority
PL
Poland
Prior art keywords
bulb
silica
bank
layer
light
Prior art date
Application number
PL37499A
Other languages
English (en)
Polish (pl)
Filing date
Publication date
Application filed filed Critical
Publication of PL37499B1 publication Critical patent/PL37499B1/pl

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PL37499A 1948-02-01 PL37499B1 (instruction)

Publications (1)

Publication Number Publication Date
PL37499B1 true PL37499B1 (instruction) 1954-08-15

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