Light bulb life extender

Equipment for production – distribution – or transformation of ene – Distribution – modification or control – Condenser – resistor or potentiometer

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D13134, 1303

Patent

active

D04234537

REFERENCES:
patent: D284653 (1986-07-01), Matican
patent: 3450893 (1969-06-01), Munson
patent: 3617766 (1971-11-01), Kahn
patent: 3818263 (1974-06-01), Belko
patent: 3823339 (1974-07-01), Borneman et al.
patent: 3875547 (1975-04-01), Kahn
patent: 4435671 (1984-03-01), Wouk
patent: 4544861 (1985-10-01), Kretchmar
patent: 4980607 (1990-12-01), Albert et al.
patent: 5716216 (1998-02-01), O'Loughlin et al.

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