Walther; Hans-Joachim
Patent Applications and Registrations
Patent applications and USPTO patent grants for Walther; Hans-Joachim.The latest application filed is for "breathing mask with flow indicator for the respiration air".
- Walther; Hans-Joachim - Lubeck DE
| Patent | Date |
|---|---|
| Breathing mask with flow indicator for the respiration air Grant 5,322,059 - Walther June 21, 1 | 1994-06-21 |
| Respirator with blower support and regeneration of the breathing filter Grant 5,036,842 - van der Smissen , et al. August 6, 1 | 1991-08-06 |
| Lung-controlled valve for respirator masks having positive pressures inside the mask Grant 4,796,619 - Walther * January 10, 1 | 1989-01-10 |
| Gas mask having a protective hood Grant 4,771,771 - Walther September 20, 1 | 1988-09-20 |
| Device for affixing a respiratory mask onto a protection helmet Grant 4,734,940 - Galet , et al. April 5, 1 | 1988-04-05 |
| Control valve for a breathing mask Grant 4,606,339 - Walther August 19, 1 | 1986-08-19 |
| Control for a protective mask which operates with excess internal pressure Grant 4,572,176 - Walther February 25, 1 | 1986-02-25 |
| Ready use respirator Grant 4,473,072 - Walther September 25, 1 | 1984-09-25 |
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