CH69727A - Method and device for the production of hollow stones with helical inner ribs - Google Patents

Method and device for the production of hollow stones with helical inner ribs

Info

Publication number
CH69727A
CH69727A CH69727A CH69727DA CH69727A CH 69727 A CH69727 A CH 69727A CH 69727 A CH69727 A CH 69727A CH 69727D A CH69727D A CH 69727DA CH 69727 A CH69727 A CH 69727A
Authority
CH
Switzerland
Prior art keywords
production
inner ribs
helical inner
hollow stones
stones
Prior art date
Application number
CH69727A
Other languages
German (de)
Inventor
Sigurd Henriksen
Original Assignee
Sigurd Henriksen
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sigurd Henriksen filed Critical Sigurd Henriksen
Publication of CH69727A publication Critical patent/CH69727A/en

Links

CH69727A 1914-06-29 1914-06-29 Method and device for the production of hollow stones with helical inner ribs CH69727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH69727T 1914-06-29

Publications (1)

Publication Number Publication Date
CH69727A true CH69727A (en) 1915-07-16

Family

ID=4317921

Family Applications (1)

Application Number Title Priority Date Filing Date
CH69727A CH69727A (en) 1914-06-29 1914-06-29 Method and device for the production of hollow stones with helical inner ribs

Country Status (1)

Country Link
CH (1) CH69727A (en)

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