Timeline for all types of items produced by
Sony Corp. [Japan]

Year	Items
1983	15
1984	32
1985	36
1986	20
1987	11
1988	9
1989	10
1990	2
1991	3
1992	1
1994	1
1995	1
1998	2

143 items with a valid date were considered for this timeline (89.94% of the total)
16 items with an invalid date.

Help us in our quest to find exact dates for:

198?: 16 items.