Growing community of inventors

Livonia, MI, United States of America

Douglas J Calvin

Average Co-Inventor Count = 2.78

ph-index = 5

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 72

Douglas J CalvinRobert J Wentworth (10 patents)Douglas J CalvinJames A Belanger (4 patents)Douglas J CalvinJames M Lapham (2 patents)Douglas J CalvinGraham J Astley (1 patent)Douglas J CalvinLionel Belanger (1 patent)Douglas J CalvinJeffrey K Underhill (1 patent)Douglas J CalvinBrian K Thompson (1 patent)Douglas J CalvinMichel LeCourt (1 patent)Douglas J CalvinKenneth A McPherson (1 patent)Douglas J CalvinMichel M Lecourt (1 patent)Douglas J CalvinLionel Belanger (1 patent)Douglas J CalvinDouglas J Calvin (11 patents)Robert J WentworthRobert J Wentworth (67 patents)James A BelangerJames A Belanger (39 patents)James M LaphamJames M Lapham (5 patents)Graham J AstleyGraham J Astley (21 patents)Lionel BelangerLionel Belanger (10 patents)Jeffrey K UnderhillJeffrey K Underhill (1 patent)Brian K ThompsonBrian K Thompson (1 patent)Michel LeCourtMichel LeCourt (1 patent)Kenneth A McPhersonKenneth A McPherson (1 patent)Michel M LecourtMichel M Lecourt (1 patent)Lionel BelangerLionel Belanger (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Belanger, Inc. (5 from 151 patents)

2. Motor City Wash Works, Inc. (4 from 16 patents)

3. Other (1 from 832,880 patents)

4. Belanger Industrial Products, Inc. (1 from 2 patents)


11 patents:

1. 11260833 - Dolly assembly for a conveyor system

2. 10458607 - Lighting device for a component of a vehicle wash system

3. 9315172 - Conveyor assembly including a trapdoor assembly having a device

4. 7784140 - Vehicle wash mitter assembly with offset racks

5. 7347771 - Flap-type rotary finishing device

6. 6949019 - Flap-type rotary finishing device

7. 6368187 - Abrading/polishing device and method of making and using same

8. 4552297 - Rotatable reloading apparatus for a stapler

9. 4432406 - Power operated bi-fold strip curtain door assembly

10. 4427049 - Power operated bi-fold strip curtain door assembly

11. 4369541 - Retractable wax, buff and polish apparatus for cars

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as of
1/2/2026
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