Kowal; Leonard J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Kowal; Leonard J..The latest application filed is for "releasable push-to-connect tube fitting".
- Kowal; Leonard J. - Prospect Heights IL
| Patent | Date |
|---|---|
| Releasable push-to-connect tube fitting Grant 4,685,706 - Kowal , et al. * August 11, 1 | 1987-08-11 |
| Releasable push-to-connect tube fitting Grant 4,621,842 - Kowal , et al. November 11, 1 | 1986-11-11 |
| Insulative coupling Grant 4,595,218 - Carr , et al. June 17, 1 | 1986-06-17 |
| Vibration resistant high pressure tube fitting Grant 4,556,242 - Kowal , et al. December 3, 1 | 1985-12-03 |
| High pressure, leakproof, blowout-proof tube fitting Grant 4,538,842 - Kowal , et al. September 3, 1 | 1985-09-03 |
| Tube bender construction Grant 4,403,496 - Kowal September 13, 1 | 1983-09-13 |
| Flaring tool Grant RE30,940 - Kowal , et al. May 25, 1 | 1982-05-25 |
| Can Tapper With Explosion Preventing Means Grant 3,817,302 - Kowal , et al. June 18, 1 | 1974-06-18 |
| Tube Bender Grant 3,685,335 - Kowal August 22, 1 | 1972-08-22 |
| Method Of Making Up An Expandable Insert Fitting Grant 3,665,591 - Kowal May 30, 1 | 1972-05-30 |
| Hand Tool For Connecting A Fitting To A Duct End Grant 3,660,884 - Kowal May 9, 1 | 1972-05-09 |
| Tube Cutter Grant 3,624,682 - Kowal November 30, 1 | 1971-11-30 |
| Flexible Tube Connection Grant 3,576,335 - Kowal , et al. April 27, 1 | 1971-04-27 |
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