| SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type WHERE (last_name = 'KNAPP') AND (first_name = 'George S.') ORDER BY date ASC, patent, type |
Total of 5 patents found where: Last Name is 'KNAPP'; First Name is 'George S.';
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| T / S | Patent | Date | Description | Patentee | Category | Assigned To |
| 1871 | ||||||
| U | 113,154 | March 28, 1871 | Improvement in Lightning Rods Lightning rod made of hollow copper star rod with iron wire filling the inside and annealed wire in the star points |
FOOT, David A. KNAPP, George S. |
Lightning Rod | |
| U | 116,453 | June 27, 1871 | Improvement in Machines for Joining Tubular Lightning Rods Machine or dies for opening one end of a tubular lightning rod and compressing the end of another rod section so the two ends fit together and secured by soldering |
KNAPP, George S. |
Lightning Rod Coupling | |
| U | 119,987 | October 17, 1871 | Improvement in Machines for Making Lightning Rods Machine for making lightning rods (see 113,154) by wrapping wires around a central core, covering with a sheath of sheet copper, and coiling up the rod as it is produced |
KNAPP, George S. |
Lightning Rod Machine | |
| 1877 | ||||||
| U | 196,235 | October 16, 1877 | Improvement in Lightning Rods Lightning rod made with a spirally fluted tubular core with one or more smaller tubular wires wrapped around in the fluted depressions with coupling having a male thread on each end to screw into end of rod which has female threads |
KNAPP, George S. |
Lightning Rod | |
| 1879 | ||||||
| U | 212,608 | February 25, 1879 | Improvement in Lightning Rods Lightning rod composed of two metal strips twisted around a rod in the middle and encased in a copper tube |
KNAPP, George S. |
Lightning Rod | |
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