|SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '428') AND (category.subclass = '676') ORDER BY description ASC, date, patent, type|
Total of 6 patents found where: Class is '428'; Subclass is '676';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|U||171,744||January 4, 1876||Improvement in Lightning Rods
Lightning rod composed of a copper sheet wrapped around a metal bar with copper wrapped wires on either side and the whole twisted
|SMITH, Charles H.
|U||132,615||October 29, 1872||Improvement in Lightning Rods
Lightning rod made of hollow or solid iron dipped several times in molten copper to coat entire surface with multiple layers
|YANCEY, Edwin L.
|U||19,819||March 30, 1858||Improvement in Lightning Conductors
Lightning rod made of iron wires wrapped with copper sheets
||Lightning Rod||Henry C. Janes|
|U||123,600||February 13, 1872||Improvement in Lightning Rods
Lightning rod made of soft iron flat on the back side and fluted on the front side then covered completely with sheet copper
|WELLS, Warren A.
|U||77,729||May 12, 1868||Improvement in Lightning Rods
Lightning rod made of wire or iron with a sheet of copper wrapped several times around it
|U||92,551||July 13, 1869||Improvement in Lightning Rods
Star shaped lightning rod made of 4-edged angle iron with a sheet of copper pressed over the outer surface and then twisted (see reissue 8,429)
|VERMILYA, Leland D.
REYBURN, William S.
HUNTER, Edmund A. W.
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