Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7219808 | Display rack for levels | Robert J. Kram | 2007-05-22 |
| 6351875 | Apparatus for securing a level and a structural component to one another | Joseph B. Coel | 2002-03-05 |
| 6249983 | Levelling apparatus for a laser level | Joseph B. Coel | 2001-06-26 |
| 6151787 | Levelling apparatus for a builder's laser level | Joseph B. Coel | 2000-11-28 |
| 5940978 | Builder's level with hand-grip feature | Joseph B. Coel | 1999-08-24 |
| 5901445 | Method for making a builder's tool | Richard S. Woods | 1999-05-11 |
| 5875576 | Method and display card for labeling a tool | Robert J. Kram | 1999-03-02 |
| 5339530 | Hand level instrument with composite metal and plastic body | — | 1994-08-23 |
| 5279041 | Level straight-edge apparatus and method of construction | — | 1994-01-18 |
| D343363 | Hand level | — | 1994-01-18 |
| 5003699 | Level vial with extender pitch range | — | 1991-04-02 |
| D314522 | Level | — | 1991-02-12 |
| D314350 | Level | — | 1991-02-05 |
| 4979310 | Composite level including an indexing system for aligning the frame with the cover plates | — | 1990-12-25 |
| D285780 | Level rule | Donald E. Wright | 1986-09-23 |
| 4599806 | Carpenter's square and protractor | — | 1986-07-15 |
| 4571845 | Polycast level instruments with means for retaining level vials therein | Donald E. Wright | 1986-02-25 |
| 4559714 | Pitch measuring apparatus | — | 1985-12-24 |
| D280185 | Level | — | 1985-08-20 |
| 4463501 | Level construction and methods of constructing a level | Gary T. Macklin | 1984-08-07 |
| 4419833 | Composite level construction | — | 1983-12-13 |