|
US3814973A
|
Electric lamps of the vibrating filament type having a cond… |
Expired / Lapsed
|
1972-09-05 |
1974-06-04 |
6 |
Details
|
|
US3435286A
|
Plural lamps for simulating a candle flame |
Expired / Lapsed
|
1965-09-17 |
1969-03-25 |
0 |
Details
|
|
US2710270A
|
Coated filaments and their production |
Expired / Lapsed
|
1954-02-09 |
1955-06-07 |
1 |
Details
|
|
US2155816A
|
Starting and operating circuit for gaseous electric dischar… |
Expired / Lapsed
|
1938-10-12 |
1939-04-25 |
0 |
Details
|