|
| Filed
on September 15, 1975 at the United States patent office the
Zippo |
| magnifier
was introduced to the product line on January 23, 1976 and |
| finally
patented on July 26, 1977 with the patent number 4.037,940 |
|
| The
magnifier # 6100 uses the same case as the rule introduced
in 1960 |
| and
holds two plexiglass lenses of 1" square size for
magnification. |
| These
lenses were not produced by Zippo Mfg. but ordered at the
nearby |
| Erie
Plastics in Erie, PA. Similar to the Zippo bottom
stamps these lenses |
| had
the Zippo logo molded into them. |
|
| The
two-piece cardboard boxes were produced by F.N. Burt in
Buffalo, NY. |
| In
1976 these cardboard boxes were colored silver and black but
due to |
| design
changes the colores were gold and black since 1977 then. |
| The
boxes contained special guarantee cards explaining the
magnifier. |
|
