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| Number | Title | Issue Date |
| 7347581 | Multi-beam flashlight A flashlight is provided. The flashlight includes a housing having a first end and a second end. A first light source is disposed at the first end of the housing. A second light source is disposed at the second end of the housing. A battery is disposed in the housin... | 03/25/2008 |
| 6750923 | Display device A known display device consists of a sheet-like support which is covered with liquid thermocromic crystals. The crystals are tempered by individual power supply to individual heatable elements, which lie close to the crystals and are placed between the sheet-like su... | 06/15/2004 |
| 6184794 | Portable lighting device having externally attached voltage tester A battery tester for use in combination with a portable lighting device such as a flashlight or lantern having a housing for retaining at least one battery including first and second terminals, each in electrical contact with an opposite pole of the batte... | 02/06/2001 |
| 5557208 | Battery tester with stacked thermochromic elements A thermochromic apparatus for testing dc voltage sources, particularly small, low voltage disposable batteries, employs a very thin resistive heater layer deposited onto a flexible dielectric substrate. A series of thermochromic elements are "stacked" (mo... | 09/17/1996 |
| 5396177 | Battery with electrochemical tester The present invention relates to an electrochemical cell and a related state of charge indicator comprising an electrochemically generated display. The state of charge indicator comprises two electrical contacts and an electrochemically generated display ... | 03/07/1995 |
| 5355089 | Moisture barrier for battery with electrochemical tester The combination of a main electrochemical cell (or battery cell) and a battery tester connected to the cell is disclosed. The battery tester is moisture sensitive, typically of the electrochemical type having a film-like construction comprising an anode l... | 10/11/1994 |
| 5339024 | Battery with electrochemical tester The present invention relates to an electrochemical cell and a related state of charge indicator comprising an electrochemically generated display. The state of charge indicator comprises two electrical contacts and an electrochemically generated display ... | 08/16/1994 |
| 5250905 | Battery with electrochemical tester An electrochemical cell is provided with an integrally related state of charge indicator comprising an electrochemically generated display. The state of charge indicator comprises two electrical contacts and an electrochemically generated display connecte... | 10/05/1993 |
| 5231356 | Flexible battery tester with a variable length resistive heater A thermo-responsive device for testing dc voltage sources, particularly small, low voltage dry cells, employs a very thin resistive heater film deposited onto a thin flexible dielectric substrate. During testing the ends of the resistive film engage the p... | 07/27/1993 |
