KELLER VOLPER E has a total of 45 patent applications. Its first patent ever was published in 1968. It filed its patents most often in Switzerland, France and Germany. Its main competitors in its focus markets civil engineering, machines and organic fine chemistry are RICOUARD L A S SA, MOBILE MINI INC and EXCELSIOR HARDWARE COMPANY.
# | Country | Total Patents | |
---|---|---|---|
#1 | Switzerland | 9 | |
#2 | France | 7 | |
#3 | Germany | 6 | |
#4 | Austria | 5 | |
#5 | United Kingdom | 5 | |
#6 | Netherlands | 5 | |
#7 | Sweden | 5 | |
#8 | United States | 2 | |
#9 | Italy | 1 |
# | Industry | |
---|---|---|
#1 | Civil engineering | |
#2 | Machines | |
#3 | Organic fine chemistry |
# | Technology | |
---|---|---|
#1 | Locks | |
#2 | Unspecified technologies | |
#3 | Bolts for doors or windows | |
#4 | Unspecified technologies | |
#5 | Special acyclic compounds |
# | Name | Total Patents |
---|---|---|
#1 | Keller-Volper Ernst | 7 |
#2 | Ernst Keller-Volper | 4 |
#3 | Keller Volper E | 3 |
#4 | Keller-Volper E | 2 |
Publication | Filing date | Title |
---|---|---|
DE2559214A1 | Key operated espagnolette lock - has two part eccentric disc linked by slot and peg to allow key withdrawal at any position (OE 15.9.76) | |
GB1473025A | Double cylinder for a lock | |
CH583841A5 | Fastening system for rotary locking bolt hook - has grooved end held in brackets with snap fit on frame | |
CH583361A5 | Rack and pinion actuated lock with nut - has nut for handle and key rotated through full circle | |
DE2435833A1 | ESPAGNOLETTE LOCK | |
GB1429383A | Espagnolette fastening | |
US3735614A | Cylinder lock | |
GB1357019A | Cylinder lock for actuation by a push-in key | |
NL167003B | Double recessed cylinder lock. |