TREA

Filter

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Information

  • Patent Grant
  • H1157
  • Patent Number
    H1,157
  • Date Filed
    Thursday, December 21, 1989
    34 years ago
  • Date Issued
    Tuesday, April 6, 1993
    31 years ago
  • US Classifications
    Field of Search
    • US
    • D23 200
    • D23 207-210
    • 210 136
    • 210 1981
    • 210 205-206
    • 210 231
    • 210 241
    • 210 244
    • 210 245
    • 210 2571-2572
    • 210 258
    • 210 260-261
    • 210 269
    • 210 275
    • 210 282
    • 210 288-290
    • 210 295
    • 210 3216
    • 210 32178
    • 210 413
    • 210 443-449
Information
Abstract
The ornamental design for a filter, as shown and described.
Description
US Referenced Citations (5)
Number Name Date Kind
D216691 Bates et al. Mar 1970
D220958 Marsh Jun 1971
D238363 Polens Jan 1976
D265227 Jolley Jun 1982
4320004 Schecter Mar 1982
Foreign Referenced Citations (3)
Number Date Country
703439 Apr 1987 JPX
6342053 Jan 1988 JPX
6342054 Jan 1988 JPX
Non-Patent Literature Citations (1)
Entry
Mechantronics Design News, vol. 8, no. 2, 1983, p. 15.