CA699770A - Variable density filter - Google Patents
Variable density filterInfo
- Publication number
- CA699770A CA699770A CA699770A CA699770DA CA699770A CA 699770 A CA699770 A CA 699770A CA 699770 A CA699770 A CA 699770A CA 699770D A CA699770D A CA 699770DA CA 699770 A CA699770 A CA 699770A
- Authority
- CA
- Canada
- Prior art keywords
- density filter
- variable density
- variable
- filter
- density
- 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.)
- Expired
Links
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA699770T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA699770A true CA699770A (en) | 1964-12-15 |
Family
ID=36010040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA699770A Expired CA699770A (en) | Variable density filter |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA699770A (en) |
-
0
- CA CA699770A patent/CA699770A/en not_active Expired
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