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Post by twetch#2123
patents.google.com US3661385A - Optical-illusion device - Google Patents A device for creating optical illusions comprising a transparent sheet, a plurality of fresnel screens spaced apart and in a regular array on the sheet, a condensing lens formed by each of the fresnel screens and a reflecting surface juxtaposed with the sheet.
What the chain says
- Block
- 633 328
- Time
- 2020-05-03T19:48:50Z
- Signer
- 1CY4SUdGVAcCZ7NbVrb99HNzv8JuM48U6T
- App
- twetch
- Type
- post
- Content type
- text/plain
- Name in tx
- twetch#2123
Fields the transaction did not carry are omitted. Open the payload to see the bytes as stored.
Signed by
1CY4SUdGVAcCZ7NbVrb99HNzv8JuM48U6T Verified