Growing community of inventors

Medina, MN, United States of America

Calvin S Krupa

Average Co-Inventor Count = 1.36

ph-index = 31

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 = 2,172

Calvin S KrupaRobert Knoss (23 patents)Calvin S KrupaRichard Thomas Steichen (1 patent)Calvin S KrupaPatrick Boedigheimer (1 patent)Calvin S KrupaCalvin S Krupa (46 patents)Robert KnossRobert Knoss (24 patents)Richard Thomas SteichenRichard Thomas Steichen (2 patents)Patrick BoedigheimerPatrick Boedigheimer (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Ultra Pac, Inc. (37 from 42 patents)

2. Other (2 from 832,912 patents)

3. Ivex Packaging Corporation (1 from 2 patents)

4. Blue Sky Foods, LLC (1 from 1 patent)

5. Oven Ready Foods LLC (1 from 1 patent)


46 patents:

1. 6550630 - Container for frozen cake batter

2. 6478181 - Shrinkable tray with attachable lids

3. 6450341 - Shipping and baking package for food items

4. D421695 - Vegetable container

5. D395985 - Food container

6. D395796 - Food container

7. D394807 - Chicken container

8. D391850 - Pie container

9. D385780 - Egg carton

10. D385784 - Fruit container

11. 5653345 - Fruit box

12. D380381 - Fruit container

13. D379300 - Fruit container

14. D378192 - Stackable berry container with hinged lid

15. D377450 - Stackable berry container with hinged lid

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as of
1/7/2026
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