The number is 3359678
The Frisbee patent was issued on September 30, 1958 as Design Patent number D183,626.
The US patent number is US 7198789 B2.
There is no US patent 555408021. There is also no US patent 55408021.
The Frisbee came about after students discovered throwing Frisbee pie pans supplied entertainment. This led Walter Fredrick Morrison to invent and patent the first plastic Frisbee.
You will have to check with the US Patent Office
US Patent No. 1582
There is no reliable data on the number of frisbee-related deaths that occur per year in the US. Frisbee-related injuries are generally rare and fatalities would be extremely uncommon.
It is US47114711UHP
That is the patent number for the first basketball. The person credited with inventing the basketball was G.L. Pierce.
Use this link to research US Patent Numbers: http://patft.uspto.gov/netahtml/PTO/srchnum.htm
United States Patent #51223123 does not exist. The highest US patent number as of 05-28-2010 is 7,725,947.
what is the US patent 878354 A