JPH0358447U - - Google Patents
Info
- Publication number
- JPH0358447U JPH0358447U JP11966689U JP11966689U JPH0358447U JP H0358447 U JPH0358447 U JP H0358447U JP 11966689 U JP11966689 U JP 11966689U JP 11966689 U JP11966689 U JP 11966689U JP H0358447 U JPH0358447 U JP H0358447U
- Authority
- JP
- Japan
- Prior art keywords
- outer frame
- frame plate
- center
- hole
- central member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims 3
- 239000000428 dust Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 1
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11966689U JPH0358447U (en]) | 1989-10-16 | 1989-10-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11966689U JPH0358447U (en]) | 1989-10-16 | 1989-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0358447U true JPH0358447U (en]) | 1991-06-06 |
Family
ID=31667777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11966689U Pending JPH0358447U (en]) | 1989-10-16 | 1989-10-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0358447U (en]) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51128878A (en) * | 1975-05-01 | 1976-11-10 | Shigematsu Seisakushiyo Kk | Powder dust filter for mask |
-
1989
- 1989-10-16 JP JP11966689U patent/JPH0358447U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51128878A (en) * | 1975-05-01 | 1976-11-10 | Shigematsu Seisakushiyo Kk | Powder dust filter for mask |