Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6586949 | Volume charge density measuring system | John Sargent | 2003-07-01 |
| 6586950 | Volume charge density measuring system | John Sargent | 2003-07-01 |
| 6536793 | Double-acting trailer hitch | — | 2003-03-25 |
| 6299191 | Double acting trailer hitch | — | 2001-10-09 |
| 6286851 | Doubling-acting reduced tongue weight trailer hitch | — | 2001-09-11 |
| 6142500 | Adjustable, weight distributing trailer hitch apparatus with spring dampening assembly | — | 2000-11-07 |
| 5951036 | Adjustable coupler for a weight distributing trailer hitch apparatus | — | 1999-09-14 |
| 5945831 | Volume charge density measuring system | John Sargent | 1999-08-31 |
| 5910217 | Cam actuated apparatus for frictionally controlling trailer sway | — | 1999-06-08 |
| 4462124 | Flush apparatus for water closet and method of operation | John M. Antos, Richard G. Lapham, Charles L. Sargent | 1984-07-31 |
| 4305164 | Portable toilet facility | Charles L. Sargent, James T. Embach, John M. Antos | 1981-12-15 |
| 4253679 | Trailer hitch carriage | — | 1981-03-03 |
| D257385 | Toilet | John M. Antos, Arthur W. Henke, John A. Hoffman | 1980-10-14 |
| D256722 | Toilet | Charles L. Sargent, Arthur W. Henke | 1980-09-02 |
| D255597 | Toilet | John M. Antos | 1980-06-24 |
| 4192027 | Toilet | Frederick A. Butler | 1980-03-11 |
| 4185337 | Portable toilet with improved flush apparatus | John M. Antos, Arthur W. Henke, James T. Embach, Frederick A. Butler, Erin J. Lindsay | 1980-01-29 |
| 4185340 | Toilet apparatus | Arthur W. Henke, John M. Antos, John T. Cameron | 1980-01-29 |
| 4180876 | Portable toilets | John M. Antos, Arthur W. Henke, John A. Hoffman, Erin J. Lindsay | 1980-01-01 |