Bubble blowing pen cap

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Element or attachment

Patent

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Details

D19 42, D19 46, D21402, 1906

Patent

active

D04262646

REFERENCES:
patent: D164548 (1951-09-01), Blish
patent: D235030 (1975-04-01), Ziff
patent: D277392 (1985-01-01), Salinger
patent: D287860 (1987-01-01), McShirley
patent: D357500 (1995-04-01), Mutterperl
patent: D406203 (1999-03-01), Cheung
patent: 2591874 (1952-04-01), Ritchie
patent: 3064387 (1962-11-01), Campbell
patent: 5653620 (1997-08-01), Lin

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