New Zealand accession dates for US patent specifications on microfilm

This information has been taken from IPONZ’s past collection of US patent specifications on microfilm. The data include the range of patent numbers which have been imaged on each roll of film and the date that the film was made publicly available in New Zealand.

The collection covers two periods: 1940-1947 and 1961-1994. US patent specifications are also available via IPONZ’s CD-Rom collection. You can request information from this collection by completing a Request Form.

Key to US microfilm accession date tables

Film reel: A reel of microfilm containing patent documents filmed page by page, viewable and printable through a microprinter.

Year: This is the year the patent was published in the US.

Number: Consecutive numbers are given for each reel of patents published in a particular period. The publication date may state a period of a week, or it may be a day.

Issue date (USPTO): This is the US publication date. It may be given as a
period of a week or it may state a particular day.

Contents: These are consecutive patent publication numbers written as a
range. The numbers are for the first and last patent documents on the reel.

Accession date IPONZ: The date the film reel was made publicly available in New Zealand at IPONZ.

• 1940- 1947 US Accessions [180 kB PDF]
• 1961-1969 US Accessions [188 kB PDF]
• 1970-1979 US Accessions [201 kB PDF]
• 1980-1989 US Accessions [217 kB PDF]
• 1990-1994 US Accessions [193 kB PDF]