Hayes, John E. R. (John Edward Rollins), 1873–
Nationality: Undetermined, possibly 
(United States)
Identities and Authority Control
- pdbooks.info ID: 167782
John E. R. (John Edward Rollins) Hayes Contributed to the Following:
| Title | Edition | Year of Publication | Role | Country of Publication | Possible Copyright Status | Available Online? | |||
|---|---|---|---|---|---|---|---|---|---|
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| The nature of patentable invention, its attributes and definition | 1945 | Author | |  | |  | | 
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