Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5643386 | Assembly process for fabric bag plug | Randy D. Smith | 1997-07-01 |
| D379851 | External sealing cap for pipes | — | 1997-06-10 |
| D378695 | Pipeline plug | Randy D. Smith | 1997-04-01 |
| D373623 | Mechanical test plug for overflow and waste drains | — | 1996-09-10 |
| 5546991 | Inflatable fabric bag plug | Randy D. Smith | 1996-08-20 |
| D370055 | Small drain flushing expandable plug | — | 1996-05-21 |
| D369652 | Miniature pneumatic test plug assembly | Marc P. Bevacco | 1996-05-07 |
| D362713 | Pneumatic plug for pipelines | — | 1995-09-26 |
| D358871 | Remote positioning pneumatic plug | Marc P. Bevacco | 1995-05-30 |
| 5353841 | Pneumatic plug for clean-out tees | Marc P. Bevacco, Bryan Benson | 1994-10-11 |
| D351013 | Mechanical inspection and sealing plug for a monitoring well | Bryan Benson | 1994-09-27 |
| D350704 | Pneumatic test plug | Marc P. Bevacco, Bryan Benson | 1994-09-20 |
| D329686 | Pipe plug latch unit | Bryan Benson | 1992-09-22 |
| D329687 | Pipe plug lock unit | Bryan Benson | 1992-09-22 |
| 4817671 | High pressure mechanical plug device | Dale K. Nelson | 1989-04-04 |
| D300350 | Expansible sealing plug for pipelines and the like | — | 1989-03-21 |
| 4763511 | Pipe joint sealing and testing apparatus | Dale K. Nelson | 1988-08-16 |
| 4691728 | Electronic test and seal apparatus and method | — | 1987-09-08 |
| 4614206 | Expansible pneumatic plug device | Dale K. Nelson | 1986-09-30 |
| 4588110 | Portable waterproofing apparatus | Dale K. Nelson | 1986-05-13 |
| 4572228 | Connector valve assembly for inflatable packer device | Richard Larson, Dale K. Nelson | 1986-02-25 |
| 4493344 | Mechanical plug device | Dale K. Nelson, Lloyd G. Cherne | 1985-01-15 |