Bizarre Patents
A portable partition for use in an automobile having a seat with a seat bench and a seat backrest.
PatentStorm News
Make the Most of PatentStorm
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest patents by subscribing to an RSS feed.
Got questions? Ask a Patent Expert!
Registered users: Manage your profile, comments and alerts.
US Patent 3998004 - Geometric construction kit
US Patent Issued on December 21, 1976
Estimated Patent Expiration Date:
December 21, 1993Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
December 21, 1993Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractThis invention employs a multiplicity of polygon-shaped members having magnetic edges which permit the members to be easily joined in order to fabricate two- and three-dimensional objects such as polygons and polyhedra for recreational and/or educational use. | InventorApplicationNo. 580981 filed on 05/27/1975US Classes:446/92, Including permanent magnet or suction cup to secure elements428/900MAGNETIC FEATUREExaminersPrimary: McNeill, G. E.Assistant: Cutting, Robert F. Attorney, Agent or FirmUS Patent References1236234, 2776521, 2872754, 3196579, 3426453International ClassA63H 33/04 (20060101) |
