Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11112161 | Ice machine | Robert Joseph Hoffman | 2021-09-07 |
| 11041668 | Ice machine | Robert Joseph Hoffman | 2021-06-22 |
| D894975 | Ice dispensing apparatus | Robert Joseph Hoffman | 2020-09-01 |
| 9404165 | Producing of pig iron from iron-containing materials | — | 2016-08-02 |
| 8545593 | Direct processing of metallic ore concentrates into ferroalloys | — | 2013-10-01 |
| 8420007 | Apparatus for direct smelting of zinc bearing compounds to produce metallic zinc | — | 2013-04-16 |
| 8043408 | Direct smelting of zinc bearing compounds to produce metallic zinc | — | 2011-10-25 |
| 7985389 | Direct processing of ferrotitania ores and sands | — | 2011-07-26 |
| D638476 | Vending machine for liquids | Sean G. Hoffman | 2011-05-24 |
| 6886585 | Soft grip drain | L. Herbert King Jr. | 2005-05-03 |
| 6802886 | Method of producing a metallized briquette | James M. McClelland, Jr. | 2004-10-12 |
| 6749664 | Furnace hearth for improved molten iron production and method of operation | David C. Meissner, Kyle James Shoop | 2004-06-15 |
| 6685761 | Method for producing beneficiated titanium oxides | Ronald D. Gray | 2004-02-03 |
| 6648942 | Method of direct iron-making / steel-making via gas or coal-based direct reduction and apparatus | Robert M. Klawonn | 2003-11-18 |
| 6582491 | Method for producing molten iron in duplex furnaces | Ronald D. Gray | 2003-06-24 |
| 6413295 | Iron production method of operation in a rotary hearth furnace and improved furnace apparatus | David C. Meissner, Kyle James Shoop, Takuya Negami, Akira Uragami, Yasuhiro Tanigaki +5 more | 2002-07-02 |
| 6251156 | Method of producing molten iron in duplex furnaces | Ronald D. Gray | 2001-06-26 |
| 6214087 | Treatment of iron oxide agglomerates before introduction into furnace | David C. Meissner, Kyle James Shoop | 2001-04-10 |
| 4731112 | Method of producing ferro-alloys | — | 1988-03-15 |
| 4728358 | Iron bearing briquet and method of making | Bradford G. True | 1988-03-01 |
| 4685964 | Method and apparatus for producing molten iron using coal | Frank V. Summers, John C. Scarlett, David C. Meissner | 1987-08-11 |