Copyright © Philip M. Parker, INSEAD. Terms of Use.
| Year | Description |
| 2001 | Invention patented by Mike Zagone and John Zagone on August 6th, 2001. Abstract: An audible safety warning message is recorded on a digital sound chip and the chip is installed in an extension tool such as an extension pole, a ladder or the like. The message playback sequence is initiated when the tool is activated to provide the user with a warning to avoid dangers such as overhead power wires and the like. |
| Source: selected by the editor from original sources. | |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
