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| Patent It YourselfDavid Pressman ISBN13 9781413300253 / ISBN10 1413300251 NOLO - April 1, 2004 Paperback (512 pages) List Price: $49.99 |
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| Date | Minimum price | Average price | Maximum price | |||
| Aug 2 2009 | $1.99 | $4.07 | $6.11 | |||
| Aug 7 2009 | $3.54 | + | $3.54 | - | $3.54 | - |
| Aug 16 2009 | $1.85 | - | $1.94 | - | $1.99 | - |
| Aug 25 2009 | $2.68 | + | $2.68 | + | $2.68 | + |
| Jan 1 2009 | $1.66 | - | $1.88 | - | $1.99 | - |
| Jan 10 2009 | $1.50 | - | $1.83 | - | $1.99 | |
| Jul 16 2009 | $1.99 | + | $2.81 | + | $4.45 | + |
| Jun 3 2009 | $1.50 | - | $1.89 | - | $2.19 | - |
| Jun 12 2009 | $1.99 | + | $2.12 | + | $2.19 | |
| Jun 20 2009 | $1.50 | - | $16.33 | + | $45.00 | + |
| Jun 29 2009 | $1.50 | $1.83 | - | $1.99 | - | |
| Mar 18 2010 | $1.99 | + | $3.77 | + | $6.14 | + |
| May 14 2009 | $1.99 | $2.06 | - | $2.20 | - | |
| May 25 2009 | $1.99 | $2.06 | - | $2.19 | - | |
| Nov 19 2008 | $2.47 | + | $2.48 | + | $2.51 | + |