Inventor
Sadao Murai
Inventor
Hitakata, JP
Overview
Patents· 3 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B29Cprimary
B29CShaping or joining of plastics50%
B29LIndexing scheme associated with subclass b29c, relating to particular articles33%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests17%
PatentTitleYear
4,135,871'Apparatus for manufacturing resin tubes alternately having a thick wall portion and a thin wall portion'19794,107,249'Method for forming an annular groove in a thermoplastic pipe'19784,036,930'Method of manufacturing resin tubes alternately having a thick wall portion and a thin wall portion'1977Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1977–1979Patents assigned to SEIKISUI CHEMICAL CO LTD (3)· patent assignee history
1977–1979Based in Hitakata, JP· patent location history
1978Based in Hirakata, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SEIKISUI CHEMICAL CO LTD | 3 | 1977–1979 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitakata, JP | 2 | 1977–1979 |
| Hirakata, JP | 1 | 1978 |