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Registered Designs

The Registered Design diamond mark

In order to get legal protection, products featuring designs registered under the system brought in on 1 September 1842 had to display a diamond-shape mark incorporating various letters and numbers. These contain information, mostly in coded form, the most important part of which being the date that the design was registered.

The letter occupying the top of the diamond indicates the year

A 1845
B 1858
C 1844
D 1852

E 1855
F 1847
H 1843
I 1846

J 1854
K 1857
L 1856
M 1859

N 1864
O 1862
P 1851
Q 1866

R 1861
S 1849
T 1867
U 1848

V 1850
W 1865
X 1842
Y 1853

Z 1860

The letter occupying the right corner of the diamond now indicated the year

A 1871
C 1870
D1878

E 1881
F 1873
H 1869

I 1872
J 1880

K 1883
L 1882

P 1877
S 1875

U 1874
V 1876

X 1868
Y 1879

 

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