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United States Patent [w]
Drews et al.
[ii] Patent Number:  Date of Patent:
 METHOD AND APPARATUS FOR
REDRAWING TRANSPARENT WINDOWS
 Inventors: Paul C. Drews, Hillsboro; James P.
Held; Dan D. Kogan, both of Portland;
James A. Larson, Beaverton, all of
 Assignee: Intel Corporation, Santa Clara, Calif.
 Appl. No.: 640,346
 Filed: Apr. 30, 1996
Related U.S. Application Data
 Division of Ser. No. 316,113, Sep. 30, 1994, abandoned.
 Int. C I. G06F 3 14
 U.S. C I 345 344
 Field of Search 395/332, 343-345
 References Cited
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Edmondson, WideAngle 2.0, The Compu Think Windows
Watcher, v. 2, N. 1, p. 13(1), Nov. 1991.
Transparent Window Selection, IBM Technical Disclosure
Bulletin, v. 30, N. 11, pp. 268-271, Apr. 1988.
Ishii et al., ClearFace: Translucent Mutiuser Interface for
Team Workstation, Proc. of 2nd Euro. Conf. on Computer-
Supported Cooperative Work (ECSCW '91), pp. 163-174,
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Ishii et al., "Toward an Open Shared Workspace: Computer and Video Fusion Approach ofTeamWorkStation", Comm. of ACM, v. 34, n. 12, pp. 37-50, Dec. 1991.
Primary Examiner—-Joseph R. Burwell
Attorney, Agent, or Firm—Blakely, Sokoloff, Taylor &
U.S. Patent Nov. 3, 1998 Sheet 1 of 23 5,831,615
*-As you remember, my interest in concertinos hod been sparked by playing with Bill's concertina. I have been going through the music section of every bookstore and the book section of every music store I come across for more information about concertinas. There is not a whole lot of informotion out there. Early on in the game, I discovered thot the most popular instrument thot comes under the name of "concertina" is something more property referred to as the "English conertina". This is the 6-sided, 8-sided, or sometimes even 12-sided bellows instrument that usually comes to people's minds. However, its key organization and its complete philosophy of notes is quite different than Bill's concertina.
The keyboard on each side of the instrument starts out with o toll, 2-wide zigzog of keys. The index finger and middle finger of a given hand "walk" up this zigzag to play a succession of thirds. Meanwhile, the index and middle finger of the other hand wolk up their own zigzag to ploy their own succession of thirds, one note higher. Thus to ploy a scale, the notes alternate from side to side of the instrument. If you wotch each hand, it's doing this zigzag wolk. Set just a little farther outboard from eoch of these "main" keys is another key that has the respective flat or sharp of that note. The notes A, B, E, have respective flats, while C, D, G, F have respective sharps. The astute observer will note thot this leads to 14 keys for a 12-tone scale. Looking ogain, we notice thot there ore two "duplicates": the D-shorp key plays the some note as the E-flot, and G-shorp is the some os A-flat
There are some other interesting consequences of this arrangement since the altemotJng rules are strict and the lowest octave in C starts out with right-index, left-middle, etc. the next octave storts out with C on the left index finger, the next octave starts out with C on the right middle finger, ond the next octave starts with C on the left middle finger. There ore four full octaves before a precise repeat of the pottem, at which point we run out of notes. The keyboard hos a "special cose" at the highest note. They left off the key for the highest A—flat, and put in the last C, giving you four full octoves of C scales including the C at the top. No actual note is omitted, due to the A-flat/G-sharp duplicate. The instrument is fully chromatic within that range. The keyboards look like the following.