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Expired patents of:
Hitachi, Ltd.

Displaying 1 to 50 of 1585 patents. (Retrieval took 0.014 seconds.)

 Patent TitleExpired:
1.Capacitance type accelerometer2007-02-28
2.Shared buffer memory type ATM communication system and method with a broadcast facility2007-02-28
3.Semiconductor device having an optical waveguide interposed in the space between electrode members2007-02-28
4.Superfine electronic device and method for making same2007-02-25
5.Magnetic device2007-02-25
6.Power transforming system and method2007-02-25
7.IP switch, interface circuit and ATM switch used for IP switch, and IP switch network system2007-02-25
8.Interoperable workflow management system2007-02-25
9.Method and apparatus for structured document difference string extraction2007-02-25
10.Soft magnetic thin film, and magnetic head and magnetic recording device using the same2007-02-23
11.Subscriber terminal of an interactive communication system and control device thereof2007-02-23
12.Grinding method and grinding machine2007-02-21
13.Exposure mask and method of manufacture thereof2007-02-21
14.Integrated circuit having power trunk line and method for layout of power trunk line2007-02-21
15.Circuit breaker with parallel resistor2007-02-21
16.Record medium reproducing device2007-02-21
17.Method and apparatus for controlling one or more hierarchical memories using a virtual storage scheme and physical to virtual address translation2007-02-21
18.Air conditioner2007-02-18
19.Electronic transaction method and system2007-02-18
20.Sodium-sulphur battery system and driving method thereof2007-02-18
21.Liquid crystal display device, light guide plate, and method for producing light guide plate2007-02-18
22.Methods for retrieving database with image information2007-02-18
23.Input/output processing system2007-02-18
24.Simultaneous bidirectional transmission circuit2007-02-16
25.Method of and apparatus for compressing and decompressing data and data processing apparatus and network system using the same2007-02-16
26.Method of wiring semiconductor integrated circuit and semiconductor integrated circuit2007-02-16
27.Optical disk apparatus and optical head thereof2007-02-16
28.Fuel assembly channel box having burnable poison2007-02-16
29.Method of arranging and removing user environment in computer network2007-02-16
30.Collaborative work support system2007-02-16
31.System for purifying exhaust gas for use in an automobile2007-02-14
32.Tape carrier package2007-02-14
33.Information processing equipment capable of multicolor display2007-02-14
34.Exhaust gas purifying apparatus for an internal combustion engine2007-02-11
35.Control system for internal combustion engine with enhancement of purification performance of catalytic converter2007-02-09
36.Metalization structure and manufacturing method thereof2007-02-09
37.Display with scan converter for converting scanning frequency of input video signal2007-02-09
38.Method of supporting perspective projection2007-02-09
39.Decision making method2007-02-09
40.Escalator apparatus and method of operation2007-02-07
41.Photosensitive resin composition for forming conductor patterns and multilayer circuit boards using same2007-02-07
42.Semiconductor integrated circuit device capable of outputting a plurality of interface levels2007-02-07
43.Magnetic disk having improved surface configuration and magnetic disk unit including same2007-02-07
44.Apparatus for installing a material which is processed by using chemicals2007-02-04
45.Control apparatus of automatic transmission and method of controlling the same2007-02-04
46.Ion beam processing apparatus and method of operating ion source therefor2007-02-04
47.Control apparatus for drive system2007-02-04
48.Multiprocessor system and methods for transmitting memory access transactions for the same2007-02-04
49.Space-saving information processing apparatus2007-02-02
50.Node device and alarm notification control method for ATM network2007-02-02

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