Telephone instrument
US4736411A · kind A · utility
Inventor
Key dates
| Filing date | Dec 24, 1986 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Dec 24, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/17
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone instrument comprising a handset and a base unit in which the base unit is substantially smooth on its upper surface except for a raised area having a spherical surface and a slight recess which respectively cooperate with a correspondingly formed spherically shaped indentation and a small raised semi-cylindrical portion on the handset. In this manner, the base unit provides a substantially smooth upper surface, so as not to provide any area that might retain dirt or grime. In one embodiment, the telephone instrument is formed of thermoplastic rubber and is substantially water-resistant, with all electrical components contained within the handset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.