In addition to Kensington's product that came out in '02, there was at least a prototype displayed at CES a few years before that by Fujitsu. Never saw it for sale in the states, but it looked like production plastics, so it was probably available in Japan.
The interesting point about the Logitech design is their best ergonomic feature isn't being noticed - it isn't even called out by Logitech. The very small sensor they're using lets them push the sensor way up to the front of the mouse. It's long been known that the mice "feel" more responsive the closer you get the sensor to a point midway between the fingertips that are guiding the mouse. Most sensors have been too big to fit up there, so they're positioned farther back, where they don't move as far as the fingertips do.
Real ergonomics is too subtle for marketing, I guess. Maybe it's because the "ball forward" concept was originally used to promote the Microsoft Dove Bar mouse http://www.ideo.com/portfolio/re.asp?x=12328 and the standard Apple ergonomic mouse of the ~90s.
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Wire not needed with a big enough rocket. See Atlas-Centaur 67 incident report. : (
In addition to Kensington's product that came out in '02, there was at least a prototype displayed at CES a few years before that by Fujitsu. Never saw it for sale in the states, but it looked like production plastics, so it was probably available in Japan.
The interesting point about the Logitech design is their best ergonomic feature isn't being noticed - it isn't even called out by Logitech. The very small sensor they're using lets them push the sensor way up to the front of the mouse. It's long been known that the mice "feel" more responsive the closer you get the sensor to a point midway between the fingertips that are guiding the mouse. Most sensors have been too big to fit up there, so they're positioned farther back, where they don't move as far as the fingertips do.
Real ergonomics is too subtle for marketing, I guess. Maybe it's because the "ball forward" concept was originally used to promote the Microsoft Dove Bar mouse http://www.ideo.com/portfolio/re.asp?x=12328 and the standard Apple ergonomic mouse of the ~90s.