Keith Douglas Ridler

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Fulbourn, EN

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Patents Grantslast 30 patents

Information Patent Grant
Linear bearing for parallel tracking arm
- Patent number 4,065,188
- Issue date Dec 27, 1977
- Strathearn Audio Limited
- Keith Douglas Ridler
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Control device
- Patent number 4,046,386
- Issue date Sep 6, 1977
- Strathearn Audio Limited
- Alexander Bennett Gosling
- G11 - INFORMATION STORAGE
Information Patent Grant
Stroboscopic device
- Patent number 4,024,473
- Issue date May 17, 1977
- Strathearn Audio Limited
- Gordon Malcom Edge
- G11 - INFORMATION STORAGE
Information Patent Grant
Pivoted arm control arrangements
- Patent number 4,023,130
- Issue date May 10, 1977
- Strathearn Audio Limited
- Keith Douglas Ridler
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for use in cleaning a gramophone disc
- Patent number 3,992,018
- Issue date Nov 16, 1976
- Strathearn Audio Limited
- Dexter Robert Plummer
- G11 - INFORMATION STORAGE
Information Patent Grant
Phonograph record detecting arrangement
- Patent number 3,966,330
- Issue date Jun 29, 1976
- Strathearn Audio Limited
- Keith Douglas Ridler
- G11 - INFORMATION STORAGE
Information Patent Grant
Phonograph auto-changer center spindle
- Patent number 3,966,215
- Issue date Jun 29, 1976
- Strathearm Audio Limited
- Keith Douglas Ridler
- G11 - INFORMATION STORAGE