Keyboard-equipped arithmetic operation control machine for electronic computers

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Description

FIG. 1 is a front, top and right side perspective view of a keyboard-equipped arithmetic operation control machine for electronic computers showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and

FIG. 6 is a rear elevational view thereof.

Referenced Cited
U.S. Patent Documents
D253947 January 15, 1980 Bellini
D257146 September 30, 1980 Valestin
Other references
  • SORD M23 shown in Catalogue of SORD Handy Business Computer M20/23; issued on Aug. 20, 1981. Catalogue of Fujitsu Micro 8; issued in Jul., 1981, Fujitsu Limited. PC-8001 shown in Catalogue of NEC Personal Computer PC-8000 Series, issued in Aug., 1981. ATARI 800; "ASCII", Jan., 1980, pp. 121-123. TI-99/4 of Texas Instruments, Inc. "ASCII", Mar., 1980, pp. 121-123. BUBCOM 80 of Systems Formulate Co., Ltd.; "ASCII", Aug., 1981. TRS-80 Model 1 of Tandy; "ASCII", Aug., 1981. SORD M23 of SORD Computer Systems Co., Ltd. "ASCII", Aug., 1981. VIC-1001 of Commodore Japan Limited; "ASCII", Aug., 1981. MB-6890 of Hitachi Sales Corporation; "ASCII", Aug., 1981. SORD M23 of SORD Computer Systems Co., Ltd. in Catalogue of SORD M20/23. IBM Personal Computer; "ASCII", Oct., 1981, p. 145; although the magazine mentions Oct., 1981 as its month of issue which is after the priority date of the basic Japanese application, it is stated in the article On Aug. 12, 1981, IBM Corporation has announced a new type of personal computer. The inventor of this U.S. application knew this announcement before filing of the Japanese application. IBM Personal Computer; Electronic News, Aug. 17, 1981. IBM Personal Computer; "ASCII", Dec., 1981. Swedish Des. Gazette, M ans nr 79-1577 Designers: Takashi Hirata et al., Proprietor: Canon, Inc. U.S. Des. Pat. No. 247,239 Gazette, Feb. 14, 1978 Title of the Article: Keyboard Inventors: Charles Paul Baechtle et al.
Patent History
Patent number: D275009
Type: Grant
Filed: Mar 15, 1982
Date of Patent: Aug 7, 1984
Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
Inventor: Mikio Shibata (Yokohama)
Primary Examiner: Susan J. Lucas
Law Firm: Finnegan, Henderson, Farabow, Garrett & Dunner
Application Number: 6/357,857
Classifications
Current U.S. Class: D14/100; With Keyboard (D18/7)