05627531 is referenced by 207 patents and cites 4 patents.

The menu selection device uses a combination of the rotary position of a rotary optical encoder and the operation of a coaxially mounted push-button switch to enable the user to progress through various layers of a hierarchical menu system. The rotary position of the shaft translates to a menu category which is selected by the user activating the push-button switch. The selection of the menu category allows the user to then sequence through the plurality of menu entries within this menu category by again rotating the shaft. The user selects one of these menu entries by again activating the push-button switch.

Title
Multi-function menu selection device
Application Number
8/315750
Publication Number
5627531
Application Date
September 30, 1994
Publication Date
May 6, 1997
Inventor
Julie A Reichert
Aurora
CO, US
Oliver A Posso
Golden
CO, US
Agent
James M Graziano
Larry R Cassett
Roger M Rathbun
Assignee
Ohmeda
NJ, US
IPC
H03M 11/00
View Original Source