Protecting engineering ideas & inventions /
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| Main Author: | |
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| Other Authors: | |
| Format: | Book |
| Language: | English |
| Published: |
Cleveland, Ohio :
Penn Institute,
1989.
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| Edition: | 3rd ed. |
| Subjects: |
| Item Description: | Includes index. |
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| Physical Description: | viii, 373 p. : ill. ; 29 cm. |
| ISBN: | 0944606040 (softcover) 0944606059 (hardcover) |