| Patents for Nathan Stephens |
Patents 1 -
8
of 8
      |
| Number | Title | Classification(s) |
| 4,319 | Machinery for riveting pipes | 29/468 |
| 67,080 | Improved tap for cement-lined pipes | 138/145, 285/189, 285/202, 285/55 |
| 87,985 | Improved rotary metal-cutter | 144/230, 407/43, 407/49 |
| 94,146 | Improvement in joints for cement-pipes | 285/294.1, 285/371, 285/373 |
| 96,282 | Improved base for bench-vises | 248/349.1, 269/100, 269/285, 269/77 |
| RE4,980 | Improvement in joints for cement-pipes | 285/290.3, 285/371, 285/420 |
| 155,473 | Improvement in cement-lined pipes | 138/146 |
| 319,144 | Method of utilizing old boiler-tubes | 138/145, 138/173, 220/4.26, 285/390, 285/417, 285/55, 285/903, 29/401.1, 29/458, 29/890.031 |
