Pietro Bonalumi

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Patents Grantslast 30 patents

Information Patent Grant
Thread tension control for sewing machines
- Patent number 4,300,464
- Issue date Nov 17, 1981
- Rockwell-Rimoldi, S.p.A.
- Pietro Bonalumi
- D05 - SEWING EMBROIDERING TUFTING
Information Patent Grant
Workpiece advancing apparatus for sewing machines
- Patent number 4,258,639
- Issue date Mar 31, 1981
- Rockwell-Rimoldi, S.p.A.
- Pietro Bonalumi
- D05 - SEWING EMBROIDERING TUFTING
Information Patent Grant
Workpiece guide for sewing machines
- Patent number 4,098,202
- Issue date Jul 4, 1978
- Rockwell-Rimoldi S.p.A.
- Nerino Marforio
- D05 - SEWING EMBROIDERING TUFTING