John W. Van Horn

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Harrison, AR, US

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Patents Grantslast 30 patents

Information Patent Grant
Coin operated timing mechanism
- Patent number 5,184,707
- Issue date Feb 9, 1993
- Duncan Industries Parking Control Systems Corp.
- John W. Van Horn
- G07 - CHECKING-DEVICES
Information Patent Grant
Chute for controlling the motion of a token moving by gravity throu...
- Patent number 5,139,128
- Issue date Aug 18, 1992
- Ducan Industries Parking Control Corp.
- Ralph H. Carmen
- G07 - CHECKING-DEVICES
Information Patent Grant
Sensor for measuring the magnetically responsive characteristics of...
- Patent number 5,119,916
- Issue date Jun 9, 1992
- Duncan Industries Parking Control Corp.
- Ralph H. Carmen
- G07 - CHECKING-DEVICES
Information Patent Grant
Coin operated timing mechanism
- Patent number 5,109,972
- Issue date May 5, 1992
- Duncan Industries Parking Control Systems Corp.
- John W. Van Horn
- G07 - CHECKING-DEVICES
Information Patent Grant
Low-power device for sorting tokens
- Patent number 5,060,777
- Issue date Oct 29, 1991
- Duncan Industries Parking Control Corp.
- John W. Van Horn
- G07 - CHECKING-DEVICES
Information Patent Grant
Non-trapping coin shuttle for electronic parking meter
- Patent number 4,717,007
- Issue date Jan 5, 1988
- Qonaar Corporation
- John W. Van Horn
- G07 - CHECKING-DEVICES