机读格式显示(MARC)
- 000 00726nam a2200205 a 4500
- 008 071203s1969 dcu i 000 0 eng
- 090 __ |a G306.9/USP/(1968)/V.1
- 090 __ |a G306.9/USP/(1968)/V.2
- 110 2_ |a United States. |b Patent office.
- 245 10 |a Index of patents issued from the United States Patent, 1968. |n Part I, |p List of patentees.
- 260 __ |a Washington : |b U.S. Government printing office, |c 1969.
- 300 __ |a 1406 p. ; |b ill., |c 22 cm.
- 500 __ |a "For sale by the Superintendent of documents, U. S. Government Printing office, Washington, D. C."
- 650 _0 |a Patents |z United States.