Built-in cleaning devices

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Patents Grantslast 30 patents

Information Patent Grant
2915019
- Patent number 2,915,019
- Issue date Dec 1, 1959
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
2713773
- Patent number 2,713,773
- Issue date Jul 26, 1955
- E21 - EARTH DRILLING MINING
Information Patent Grant
2686649
- Patent number 2,686,649
- Issue date Aug 17, 1954
- E04 - BUILDING
Information Patent Grant
2641514
- Patent number 2,641,514
- Issue date Jun 9, 1953
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
2618122
- Patent number 2,618,122
- Issue date Nov 18, 1952
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
2290507
- Patent number 2,290,507
- Issue date Jul 21, 1942
- B66 - HOISTING LIFTING HAULING