KEYHOLE 500 PATENT ANALYSIS
Keyhole Analysis
Patents: 500
USPTO Classes: 120
Assignees: 31
File Date: 1973 - 1996
Keyhole Analysis
Patent Information
Patent List
Patent
Proximity
Title
Assignee
Filed Date
3,931,492
∞ 25 50 100
Thermal print head
Nippon Telegraph and Telephone Public Corporation
06/07/1973
3,936,815
∞ 25 50 100
Apparatus and method for writing storable images into a matrix-addressed image-storing liquid crystal display device
Nippon Telegraph and Telephone Public Corporation
07/29/1974
3,940,736
∞ 25 50 100
Digital code monitor system
Nippon Telegraph and Telephone Public Corporation
07/24/1974
3,942,142
∞ 25 50 100
Electromagnetic coordinate selection device
Nippon Telegraph and Telephone Public Corporation
11/27/1974
3,949,156
∞ 25 50 100
Floor cable with folded portions for making branch connections and method of producing same
Nippon Telegraph & Telephone Public Corporation
12/11/1974
3,950,073
∞ 25 50 100
Eccentric core optical waveguide
Nippon Telegraph & Telephone Public Corporation
05/23/1974
3,952,166
∞ 25 50 100
Loudspeaking telephone circuit
Nippon Telegraph and Telephone Public Corporation
10/03/1974
3,957,474
∞ 25 50 100
Method for manufacturing an optical fibre
Nippon Telegraph and Telephone Public Corporation
04/17/1975
3,958,171
∞ 25 50 100
Inverter controlling device
Nippon Telegraph and Telephone Public Corporation
03/10/1975
3,978,275
∞ 25 50 100
Telecommunication cable and method and apparatus for manufacturing the same
Nippon Telegraph and Telephone Public Corporation
01/29/1975
3,982,906
∞ 25 50 100
Production of aluminum-aluminum oxide dispersion composite conductive material and product thereof
Nippon Telegraph and Telephone Public Corporation
11/14/1973
3,987,377
∞ 25 50 100
Elastic surface wave propagation device
Nippon Telegraph and Telephone Public Corporation
02/05/1975
4,000,247
∞ 25 50 100
Dielectric active medium for lasers
Nippon Telegraph and Telephone Public Corporation
05/20/1975
4,002,860
∞ 25 50 100
Transmitting and receiving apparatus
Nippon Telegraph and Telephone Public Corporation
04/02/1975
4,003,813
∞ 25 50 100
Method of making a magnetic oxide film with high coercive force
Nippon Telegraph and Telephone Public Corporation
08/14/1975
4,004,140
∞ 25 50 100
Digital attenuator
Nippon Telegraph and Telephone Public Corporation
09/20/1974
4,007,433
∞ 25 50 100
Elastic surface wave filter
Nippon Telegraph and Telephone Public Corporation
07/09/1975
4,012,108
∞ 25 50 100
Hologram memory apparatus
Nippon Telegraph and Telephone Public Corporation
01/15/1975
4,013,040
∞ 25 50 100
Apparatus for epitaxially growing a laminate semiconductor layer in liquid phase
Nippon Telegraph and Telephone Public Corporation
12/11/1975
4,013,534
∞ 25 50 100
Method of making a magnetic oxide film
Nippon Telegraph and Telephone Public Corporation
10/14/1975
4,028,144
∞ 25 50 100
Semi-hard magnetic alloy with composite magnetic property and method of making the same
Nippon Telegraph and Telephone Public Corporation
08/14/1975
4,028,148
∞ 25 50 100
Method of epitaxially growing a laminate semiconductor layer in liquid phase
Nippon Telegraph and Telephone Public Corporation
12/11/1975
4,030,949
∞ 25 50 100
Method of effecting liquid phase epitaxial growth of group III-V semiconductors
Nippon Telegraph and Telephone Public Corporation
06/26/1975
4,032,846
∞ 25 50 100
Digital mobile communication system and method
Nippon Telegraph and Telephone Public Corporation
10/08/1975
4,039,961
∞ 25 50 100
Demodulator for combined digital amplitude and phase keyed modulation signals
Nippon Telegraph and Telephone Public Corporation
09/08/1975
4,047,115
∞ 25 50 100
Sample pulse generating apparatus
Nippon Telegraph and Telephone Public Corporation
11/19/1976
4,047,221
∞ 25 50 100
Interframe coding apparatus
Nippon Telegraph and Telephone Public Corporation
09/30/1976
4,051,332
∞ 25 50 100
Multiplex digital echo suppression system
Nippon Telegraph and Telephone Public Corporation
08/08/1974
4,051,460
∞ 25 50 100
Apparatus for accessing an information storage device having defective memory cells
Nippon Telegraph and Telephone Public Corporation
01/23/1976
4,051,530
∞ 25 50 100
Frame-to-frame coding system
Nippon Telegraph and Telephone Public Corporation
10/20/1975
4,052,563
∞ 25 50 100
Multiplex speech transmission system with speech analysis-synthesis
Nippon Telegraph and Telephone Public Corporation
10/07/1975