CA540145A - Safety helmet - Google Patents
Safety helmetInfo
- Publication number
- CA540145A CA540145A CA540145A CA540145DA CA540145A CA 540145 A CA540145 A CA 540145A CA 540145 A CA540145 A CA 540145A CA 540145D A CA540145D A CA 540145DA CA 540145 A CA540145 A CA 540145A
- Authority
- CA
- Canada
- Prior art keywords
- safety helmet
- helmet
- safety
- 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 |
---|---|---|---|
CA540145T |
Publications (1)
Publication Number | Publication Date |
---|---|
CA540145A true CA540145A (en) | 1957-04-30 |
Family
ID=35697281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA540145A Expired CA540145A (en) | Safety helmet |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA540145A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3278867A (en) * | 1963-08-27 | 1966-10-11 | Bell Telephone Labor Inc | Compact ultrasonic strip delay line having sharp bend in delay medium |
US5101517A (en) * | 1990-07-06 | 1992-04-07 | Willie Douglas | Sports helmet with transparent windows in the side walls |
-
0
- CA CA540145A patent/CA540145A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3278867A (en) * | 1963-08-27 | 1966-10-11 | Bell Telephone Labor Inc | Compact ultrasonic strip delay line having sharp bend in delay medium |
US5101517A (en) * | 1990-07-06 | 1992-04-07 | Willie Douglas | Sports helmet with transparent windows in the side walls |
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