CA1144205A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Device to make a book stay open
Assignee: PUREWAL PAL S
•
Filing: 1981-09-23
•
Granted: 1983-04-05
•
Expires: 2001-09-23
Abstract
Abstract ABSTRACT It is common knowledge that most books while being read tend to close by themselves if (A) they are not kept open by hand, or (B) some sort of weight is not used to keep them open or (C) some special device is not used. This invention relieves the reader of having to use either of the first two methods. It relates to a new device for keeping a book open.
Inventors
- 👤 Pal S. Purewal
- 👤 Fred Knopke
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 12:06
CPC Classifications
B; B42; B42D; B42D9/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.