They Invented What? (No. 181)

U.S. Pat. No. 6,145,838: Luminescent playing cards.

 

What is claimed is:

1. A set of playing cards, comprising:
          a plurality of cards, wherein each card includes distinct indicia printed thereon, the distinct indicia including a first image viewable under lighted conditions but substantially unseen in the dark and a second image viewable when dark but substantially unseen under lighted conditions, wherein the first image is revealed under lighted conditions and the second image is revealed under non-lighted conditions to offer a playing card with dual images.

2. The set of playing cards according to claim 1, wherein the first image is imprinted with conventional ink.

3. The set of playing cards according to claim 1, wherein the second image is imprinted with luminescent ink.

4. The set of playing cards according to claim 3, wherein the first image is imprinted with conventional ink.

5. The set of playing cards according to claim 3, wherein the second image is imprinted with phosporescent ink.

6. The set of playing cards according to claim 1, wherein the set of playing cards includes fifty-two cards.

7. The set of playing cards according to claim 1, the second image is the inverse of the first image.

8. The set of playing cards according to claim 1, wherein each card includes a front face imprinted with a standard design found upon each of the cards found in the set and a second face upon which the first image and the second image are imprinted.

9. The set of playing cards according to claim 8, wherein the second image is imprinted with luminescent ink.

10. The set of playing cards according to claim 9, wherein the first image is imprinted with conventional ink.